(CNN) — Black gooey methane bubbles pop on the surface of the Lake Pit outside the La Brea Museum in Los Angeles. It's the only warning of the sticky, heavy asphalt on the bottom of the pit. The asphalt
SAN FRANCISCO, CALIFORNIA - OCTOBER 03: Actor Maisie Williams speaks onstage during TechCrunch Disrupt San Francisco 2019 at Moscone Convention Center on October 03, 2019 in San Francisco, California.
Narrow rows of shallow gray bins tower to the ceiling. Resting inside are the jaw bones of saber-toothed cats and ancient coyotes that perished in the La Brea Tar Pits as many as 40,000 years ago. “The