The Brief

More than 13,000 years ago, when an abundance of saber-toothed cats roamed the Los Angeles Basin, the giant mammal would hide in tall savanna grasses or behind juniper shrubs and stalk its prey.

“We think they were probably ambush predators,” says Emily Lindsey, associate curator and excavation site director at the La Brea Tar Pits museum and paleontology research site.

When it spotted its target — horses, camels, mammoths or other large animals known as megafauna — it would use its powerful forearms to leap out and pin down its prey.

Then, using its 8-inch-long curved canines — serrated like a steak knife — it would slice through a vein and let the animal bleed out.

“All of that information is based on research here because we have this incredible collection of more than 2,000 saber-toothed cats,” Lindsey says. “It’s really rare that we have the whole record. You don't usually get that in paleontology.”

L.A.'s climate past and future

The La Brea Tar Pits — home to more than 3.5 million Ice Age fossils — is one of the planet’s best-kept records of what it was like in the area we now know as Southern California over the last 60,000 years. It’s also the world’s only active urban fossil dig site.

Fossils found in the asphalt help paint the picture of the life that once flourished here during the Ice Age: saber-tooth cats, giant sloths, dire wolves, grizzly bears, bison as well as juniper and oak trees.

Emily Lindsey, an assistant curator at the LA Brea Tar Pits, places a fossil inside the fossil collection room.

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Zaydee Sanchez

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LAist

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But it's not just telling the story of the region’s past. This collection of Ice Age fossils also helps scientists understand what led to the most massive extinction of megaspecies on Earth since dinosaurs, when droves of large mammals suddenly died as extreme heat, drought and large-scale wildfires overwhelmed the region.

And as we endure another period of significant environmental change, these fossils also offer a window into the future.

“There was this ‘ah ha’ moment for paleontologists,” Lindsey says. “We said: ‘Oh wait, we have a really unique insight on that story because we can actually look at these different windows of different habitats from different times and see how they respond to climate change in real time.”

It’s part of a growing field called paleoecology, which aims to use the knowledge of prehistoric ecosystems that fossils yield to predict how plants and animals will respond to environmental events now and in the future.

“The fact that we have particular species of plants, or insects, or birds, or rodents can tell us a lot about how hot or cold it was, how wet or dry it was, and how that environment changed through time,” Lindsey says.

This link between the end of the Ice Age and the global warming we’re experiencing now is a focus of the ongoing research at the Tar Pits. Particularly, scientists seek to use fossil data to make decisions about how to preserve biodiversity today.

“You can only get that by looking at the fossil record,” Lindsey says.

The tar pits

About 1,000 feet beneath the metropolis of L.A. sits the Salt Lake Oil Field.
(The Los Angeles Basin is the richest in terms of oil by unit volume on earth). That, paired with the abundance of earthquakes in the region, which create cracks and chasms in the earth, paves the way for the tar pits.

Tar pits — sticky, shallow pools of asphalt that seep up through cracks and fissures in the ground — are essentially naturally occurring preservation deposits. The asphalt is so sticky that when animals stepped into it — even enormous ones like the now extinct pre-Columbian mammoth — they got trapped and couldn't get out.

Inside Tar Pit 91, where research is currently being done.

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The result? Meticulously preserved fossils that have been embalmed in asphalt for tens of thousands of years without exposure to air.

“So we get phenomenal preservation not just of bones, but of leaves and wood, insects and shells,” Lindsey says. “That’s what’s allowed us to build up the richest record of Ice Age life anywhere.”

Researchers examine fossils discovered in the tar pits.

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Zaydee Sanchez

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Using the fossil record to inform conservation decisions

Studies from Tar Pits researchers suggest extreme heat, drought and large-scale wildfires might be at the root of the last major extinction event.

Last year, a study published by researchers there found that large-scale wildfires — possibly started by humans — wiped out many of the large Ice Age mammals. The research broke new ground in an ongoing scientific debate over what triggered the Earth’s last major extinction event.

It adds more evidence to the growing understanding that extreme heat, drought and wildfires can drastically change habitats, leading to species extinction.

“This is just one example of how we can use fossil data to inform conservation and land management decisions today,” Lindsey says.

In an ongoing partnership with the Nature Conservancy, La Brea Tar Pits is now developing a practitioner's guide for land managers, mapping out ways to use fossil data in environmental decision making.

“In other words: How do you use historical and paleontological data to help inform conservation and restoration work in urban areas?” Lindsey says. “This will help address that.”

"When planning for these types of projects, The Nature Conservancy sets goals using information from a variety of sources," says Sophie Parker, director of science for climate and land use at The Nature Conservancy. "Knowing what was present at a site at multiple timepoints in the past, including the more distant past, is useful because it gives us a broader perspective on how to craft our goals."

Asphalt can be observed flowing from the gated tar pits, allowing visitors to witness the phenomenon.

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The Tar Pits also dedicates a small section of the park as the “Pleistocene Garden,” which contains plants that grew at La Brea at different times in history found in the fossil record. With plans for a major re-landscaping of the park currently in the works, there is a focus to significantly expand plants in line with the paleontological science on the grounds.

“It’s a way to viscerally communicate that story but also bring back some of those plants and serve as seed banks and help support urban nature,” Lindsey says.

Sharing the climate story

Beyond the rich scientific research backed by tens of thousands of years of fossil data, Lindsey says the most important part of the work they do at this critical environmental moment is public education.

By presenting current climate research alongside Ice Age fossil data, the hope is that it will drive a deeper understanding of our environmental crisis and emphasize a dire conclusion: then, as now, climate changes and human activities can intersect to drive large scale extinctions.

It's all laid out for the public to see in the La Brea Tar Pits museum and across its grounds.

“To have a place in the third biggest city in North America where people can see an entire scientific process," says Lindsey, "that’s another very powerful thing.”

Remains of mammoths can be seen at the La Brea Tar Pits.

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Zaydee Sanchez

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There is one notable, but perhaps hopeful, difference between then and now, Lindsey says.

The climate change that occurred at the end of the Ice Age 13,000 years ago was purely related to the earth’s orbital cycles.

Today, it’s 100% us.

“Meaning we completely have the ability to stop it if we want to,” Lindsey says. “It’s just a matter of political and societal will. I hope this helps people understand that small human actions could push the ecosystem to a tipping point.”

By the end of January, students will have returned to two of the three public school campuses burned in the Palisades Fire one year prior, though their classrooms are temporary.

Palisades Charter High School students are scheduled to return to their campus Jan. 27. They’ve been in a refurbished Santa Monica department store since April.

“ I am just overwhelmed with gratitude for the constant support that has been shown for our school and for our families, our teachers, all of our administrators and staff,” said Principal Pamela Magee at a press conference Tuesday with Los Angeles Unified leaders. Pali High is an independent charter high school located on district property.

In June, the LAUSD Board approved a $604 million plan to rebuild the high school, as well as two burned district elementary schools— Marquez and Palisades.

Superintendent Alberto Carvalho said the three campuses’ new buildings will open in 2028— shaving two years off of the original 5-year timeline.

“ These projects will come in on time or ahead of schedule,” Carvalho said. “These projects will come in at or below budget, and these projects will honor the resilience, the determination, the courage and yes, the suffering and the sacrifice of the community of the Palisades.”

About the costs and the design

The district plans to use money from the $9 billion bond voters approved in 2024 to help pay for the rebuild, but also anticipates some reimbursement from its insurer and FEMA.

District-contracted architects are finalizing their designs and plan to submit to the state for approval in the spring, said Chief Facilities Executive Krisztina Tokes. She said the plan is to rebuild with future environmental risks in mind.

“ From the earliest design stages, wildfire resiliency has been treated as a core requirement and not an add-on,” Tokes said. For example, using fire-resistant concrete blocks, installing enhanced air filtration systems and planting shade trees where they won’t hang over buildings.

Environmental testing preceded students’ return to the fire-impacted campuses. Director of the Office of Environmental Health and Safety Carlos Torres said the district continues to monitor air quality through its network of sensors and is developing a plan for periodic testing.

“We just can't just walk away,” Torres said.

Enrollment is down at all three schools compared to before the fires, but district leaders say they are confident families will return to the rebuilt campuses.

“I find it hard to believe that this community won't come back to its former glory,” said Board Member Nick Melvoin, who represents the Palisades. “We gave a lot of thought in an accelerated timeline to rebuilding for the next century.”

Marquez Charter Elementary

What’s the damage? The campus is a “total loss.” More than three dozen classrooms, administration buildings, the school’s auditorium and playground burned down.

How much has LAUSD budgeted to rebuild? $202.6 million

Where are the students? Students returned in September to portables covering about one-third of the campus. There’s also two playgrounds, a garden, library and shaded lunch area. Enrollment has dropped 60% compared to before the fire from 310 to 127 students.

What’s next? District-contracted architects are finalizing their designs and plan to submit to the state for approval in the spring.

Palisades Charter Elementary School teacher Ms. Davison talks with her students in their new classroom on the campus of Brentwood Elementary Science Magnet last year.

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Brian van der Brug

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Los Angeles Times via Getty Images

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Palisades Charter Elementary

What’s the damage? About 70% of the campus was destroyed including 17 classrooms, the multipurpose room and play equipment.

How much has LAUSD budgeted to rebuild? $135 million

Where are the students? Students continue to share a campus with Brentwood Science Magnet. Enrollment has dropped 25% compared to before the fire from 410 to 307 students.

What’s next? District-contracted architects are finalizing their designs and plan to submit to the state for approval in the spring.

Palisades Charter High School, pictured in December 2025, is scheduled to reopen to students Jan. 27, 2026.

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Kayla Bartkowski

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Los Angeles Times via Getty Images

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Palisades Charter High School

What’s the damage? About 30% of the campus was destroyed including 21 classrooms, storage facilities and the track and field.

How much has LAUSD budgeted to rebuild? $266 million

Where are the students? Students started the school year in a renovated Sears building in downtown Santa Monica. Enrollment has dropped 14% compared to before the fire, from 2,900 to 2,500 students.

What’s next? Classes will resume at the main campus Tues. Jan. 27 in a combination of surviving buildings and 30 new portable classrooms.

The Trump administration says it’s planning to freeze about $10 billion in federal support for needy families in California and four other Democrat-run states, as the president announced an investigation into unspecified fraud in California.

The plans come on the heels of the Trump administration announcing a freeze on all federal payments for child care in Minnesota, citing fraud allegations against daycare centers in the state.

The state’s Democrat governor, Tim Walz — who ran for vice president against Donald Trump’s ticket in 2024 — announced Monday he was dropping out of running for reelection. He pointed to fraud against the state, saying it’s a real issue while alleging Trump and his allies were “seeking to take advantage of the crisis.”

On Monday, the New York Post reported that the administration was expanding the funding freeze to include California and three other Democrat-led states, in addition to Minnesota. Unnamed federal officials cited “concerns that the benefits were fraudulently funneled to non-citizens,” The Post reported.

Early Tuesday, President Trump alleged that corruption in California is worse than Minnesota and announced an investigation.

“California, under Governor Gavin Newscum, is more corrupt than Minnesota, if that’s possible??? The Fraud Investigation of California has begun. Thank you for your attention to this matter! PRESIDENT DONALD J. TRUMP,” the president wrote on his social media platform Truth Social.

He did not specify what alleged fraud was being examined in the Golden State.

LAist has reached out to the White House to ask what the president’s fraud concerns are in California and to request an interview with the president.

“For too long, Democrat-led states and governors have been complicit in allowing massive amounts of fraud to occur under their watch,” said an emailed statement from Andrew Nixon, a spokesperson for U.S. Department of Health and Human Services, which administers the federal childcare funds.

“Under the Trump administration, we are ensuring that federal taxpayer dollars are being used for legitimate purposes. We will ensure these states are following the law and protecting hard-earned taxpayer money.”

Gov. Gavin Newsom’s press office disputed Trump’s claim on social media, arguing that since taking office, the governor has blocked $125 billion in fraud and arrested “criminal parasites leaching off of taxpayers.”

Criminal fraud cases in CA appear to be rare for this program

Defrauding federally funded programs is a crime — and one LAist has investigated, leading to one of the largest such criminal cases in recent years against a California elected official, which surrounded meal funds.

When it comes to the federal childcare funds that are being frozen, the dollar amount of fraud alleged in criminal cases appears to be a tiny fraction of the overall program’s spending in California.

A search of thousands of news releases by all four federal prosecutor offices in California, going back more than a decade, found a total of one criminal case where the press releases referenced childcare benefits.

That case, brought in 2023, alleged four men stole $3.7 million in federal childcare benefits through fraudulent requests to a San Diego organization that distributed the funds. All four pleaded guilty, with one defendant sentenced to 27 months in prison and others sentenced to other terms, according to authorities.

It appears to be equivalent to one one-hundredth of 1% of all the childcare funding California has received over the past decade-plus covered by the prosecution press release search.

Potential impact on California families

The plans call for California, Minnesota, New York, Illinois and Colorado to lose about $7 billion in cash assistance for households with children, almost $2.4 billion to care for children of working parents, and about $870 million for social services grants that mostly benefit children at risk, according to unnamed federal officials speaking to the New York Times and New York Post.

In the largest category of funding, California receives $3.7 billion per year. The program is known as Temporary Assistance for Needy Families, or TANF.

 ”It's very clear that a freeze of those funds would be very damaging to the children, families, and providers of California,” said Stacy Lee, who oversees early childhood initiatives "at Children Now, an advocacy group for children in California.

 ”It is a significant portion of our funds and will impact families and children and providers across the whole state,” she added. “It would be devastating, in no uncertain terms.”

About 270,000 people are served by the TANF program in L.A. County — about 200,000 of whom are children, according to the county Department of Public Social Services.

“Any pause in funding for their cash benefits – which average $1000/month - would be devastating to these families,” said DPSS chief of staff Nick Ippolito.

Ippolito said the department has a robust fraud prevention and 170-person investigations team, and takes allegations “very seriously.”

It remains to be seen whether the funding freeze will end up in court. The state, as well as major cities and counties in California, has sued to ask judges to halt funding freezes or new requirements placed by the Trump administration. L.A. city officials say they’ve had success with that, including shielding more than $600 million in federal grant funding to the city last year.

A union representing California childcare workers said the funding freeze would harm low-income families.

“These threats need to be called out for what they are: direct threats on working families of all backgrounds who rely on access to quality, affordable child care in their communities to go to work every day supporting, and growing our economy,” said Max Arias, chairperson for the Child Care Providers United, which says it represents more than 70,000 child care workers across the state who care for kids in their homes.

“Funding freezes, even when intended to be temporary, will be devastating — resulting in families losing access to care and working parents facing the devastating choice of keeping their children safe or paying their bills.”

Federal officials planned to send letters to the affected states Monday about the planned funding pauses, the New York Post reported. As of 3 p.m. Tuesday, state officials said they haven’t gotten any official notification of the funding freeze plans.

“The California Department of Social Services administers child care programs that help working families afford safe, reliable care for their children — so parents can go to work, support their families, and contribute to their communities,” said a statement from California Department of Social Services spokesperson Jason Montiel.

“These funds are critical for working families across California. We take fraud seriously, and CDSS has received no information from the federal government indicating any freeze, pause, or suspension of federal child care funding.”