An explosion erupts following an Israeli airstrike in Gaza City, Wednesday, Sept. 9, 2026. (AP Photo/Jehad Alshrafi)

Chrissy Garcia, curator and manager of Stanford Doerr School of Sustainability, specimen collection, left, hands a fossilized tooth of a Pacific mastodon to Charlene Gage, director of University public relations, during an interview, Tuesday, Sept. 15, 2026, in Palo Alto, Calif. (AP Photo/Jeff Chiu)

A fossilized tooth of a Pacific mastodon, left, is displayed during an interview in the Stanford Doerr School of Sustainability, Tuesday, Sept. 15, 2026, in Palo Alto, Calif. (AP Photo/Jeff Chiu)

Chrissy Garcia, curator and manager of Stanford Doerr School of Sustainability, specimen collection, gestures toward a fossilized tooth of a Pacific mastodon during an interview, Tuesday, Sept. 15, 2026, in Palo Alto, Calif. (AP Photo/Jeff Chiu)

A fossilized tooth of a Pacific mastodon, left, is displayed during an interview in the Stanford Doerr School of Sustainability, Tuesday, Sept. 15, 2026, in Palo Alto, Calif. (AP Photo/Jeff Chiu)

A fossilized tooth of a Pacific mastodon, left, is displayed during an interview in the Stanford Doerr School of Sustainability, Tuesday, Sept. 15, 2026, in Palo Alto, Calif. (AP Photo/Jeff Chiu)

President Donald Trump speaks during the RNC Midterm Convention, Wednesday, Sept. 9, 2026, at the American Airlines Center in Dallas. (AP Photo/Jacquelyn Martin)

Laura Bligh holds a sign outside the John F. Kennedy Center for the Performing Arts in Washington, Tuesday, Sept. 15, 2026. (AP Photo/Jacquelyn Martin)