Beneath the museums and boulevards of Los Angeles lies one of Earth's most extraordinary paleontological treasures. The La Brea Tar Pits, located in the heart of the city just beyond Lacma, represent the world's only active ice age excavation site operating in an urban setting. When the museum closes this July for a two-year renovation, visitors will lose access to a place that has captivated scientists and tourists alike since 1977.
The tar pits contain the fossilized remains of more than 2 million specimens from creatures that vanished over 13,000 years ago. Massive short-faced bears weighing up to 2,000 pounds, saber-toothed cats, American lions larger than modern African lions, and entire herds of mastodons are all preserved here in remarkable condition. The site's iconic Lake Pit, with its fiberglass family of mammoths seemingly trapped in sticky doom, has become the visual symbol of a place where paleontology unfolds in real time on public view.
What makes La Brea unique is not just its sheer volume of fossils but the preservation quality that researchers rarely encounter elsewhere. The tar itself acts as a time capsule, preventing organic decay and retaining collagen in the bones, which allows for extremely accurate carbon dating. Emily Lindsey, the museum's associate curator and excavation director, compares the site to Pompeii, but operating continuously in the middle of a massive modern city with over a century of active study.
The geological story behind the pits is equally remarkable. An underground fault created an upwelling of oil that transforms into tar pools when it reaches air. Long before Los Angeles became an oil boom town in the early 1900s, the Chumash people harvested tar from these same ponds to waterproof their boats. When oil derricks were drilled on the private Rancho La Brea land around 1913, workers began unearthing bones instead of crude. The discovery shifted focus entirely, and by 1915, excavators had recovered roughly 750,000 fossil remnants.
The sheer density of predator remains sparked a compelling theory about how the pits functioned as a natural trap. Large herbivores would become mired in the tar seeps, camouflaged by water and vegetation, and their distress calls would lure carnivores to their doom. This pattern explains why 90 percent of recovered specimens belong to carnivores or scavengers. Today, scientists recognize La Brea as the richest paleontological site on Earth for late Quaternary terrestrial fossils, with 59 mammal species and 135 bird species documented alongside abundant plant and insect life.
The $240 million renovation, designed by the prestigious New York firm Weiss/Manfredi, will fundamentally reimagine the visitor experience. The project originated in 2019 with extensive community input and was formally awarded in 2023. While the museum's distinctive brutalist structure, hidden within grass-covered berms, will remain largely intact, the interior will be completely transformed. New dynamic dioramas will replace isolated specimen mounts, contextualizing extinct megafauna within their ancient landscape. The Fossil Lab will retain its signature viewing windows, preserving the opportunity to watch scientists restore fossils in real time.
Outside, the park will shed its dated tropical plantings in favor of native species from Los Angeles during the Paleocene era. New walkways, a pedestrian bridge, and an outdoor classroom around active excavation sites will create what museum leadership describes as a true indoor-outdoor experience. The current design remains largely disconnected, with visitors able to walk through the park without seeing the museum or understanding its connection to the tar pits themselves.
The renovation also signals a shift in how the institution markets itself. Rather than remaining primarily a children's destination, the museum aims to appeal across generations. The new exhibits will connect the extinction story of ice age megafauna to contemporary climate crisis and species endangerment, helping visitors understand how the past informs ecosystem management today. Lori Bettison-Varga, president and director of the Natural History Museums of Los Angeles County, emphasized that the reimagined space is designed for everyone, from young children to senior visitors.
For paleontology enthusiasts and casual tourists alike, the closure represents a rare opportunity to witness an institution fundamentally evolve. When the doors reopen in 2026, La Brea will present a modernized vision of what it means to make science accessible and visible to the public.
Author James Rodriguez: "La Brea was always the city's best-kept fossil secret, hidden behind brutalist walls and overlooked by crowds heading to shinier museums nearby. This renovation could finally give the site the showcase it deserves."
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