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Mammoths and other extinct Ice Age giants clung on longer than previously thought, DNA analysis suggests

Miami Beach, Biscayne Bay, waterfront homes. (Photo by: Jeffrey Greenberg/Universal Images Group via Getty Images)

Florida is ditching palm trees to fight the climate crisis

View on Napali Coast on Kauai island on Hawaii

Travel to Hawaii during Covid-19: What you need to know before you go

Aerial view of container ships waiting to enter and unload at the port of Long Beach on October 16, 2021 in Long Beach, California.

Everything you're waiting for is in these containers

Leading oil exporter Saudi Arabia aims to reach net-zero carbon emissions by 2060, Crown Prince MBS says

Reconstructed Viking-Age building adjacent to the site of L'Anse aux Meadows.

Vikings explored the Americas long before Christopher Columbus

Geophysicist canceled at MIT over personal politics_00031608.png

Politics overshadowing scientific work

Pictures of Gabby Petito and her boyfriend/fiance Brian Laundrie before her disappearance

The manhunt for Brian Laundrie is over. But several big questions remain

TOPSHOT - Saudi Crown Prince Mohammed bin Salman arrives at the Future Investment Initiative FII conference in the Saudi capital Riyadh on October 24, 2018. - The summit, nicknamed "Davos in the desert", has been overshadowed by growing global outrage over the murder of a Saudi journalist inside the kingdom's consulate in Istanbul. (Photo by GIUSEPPE CACACE / AFP) (Photo credit should read GIUSEPPE CACACE/AFP via Getty Images)

Top oil exporter Saudi Arabia targets net zero emissions by 2060

Showers drifted across the drought-stricken and fire-scarred landscape of Northern California on October 20, 2021, followed by a series of stronger storms that are expected to bring significant rain and snow into next week, forecasters said.

Weather whiplash: A series of storms could ease California drought, but also unleash flood hazards

As regional tensions rise, Japan's ground troops hold their first military drills in decades

Residents of Benton Harbor, Michigan pick up bottle water distributed by the state.

Benton Harbor, Michigan, declares state of emergency due to contaminated water

Failing resources in one Michigan town leaves residents with no clean water

Biden's problem is bigger than two unruly senators

Senate Majority Leader Chuck Schumer, D-N.Y., speaks to reporters as work continues on the Democrats' Build Back Better Act, massive legislation that is a cornerstone of President Joe Biden's domestic agenda, at the Capitol, in Washington, Tuesday, Sept. 14, 2021. (AP Photo/Andrew Harnik)

What Biden's sweeping social safety plan might include -- and what it likely won't

Democratic Presidential candidate and former US Vice President Joe Biden participates in an ABC News town hall event at the National Constitution Center in Philadelphia on October 15, 2020. (Photo by JIM WATSON / AFP) (Photo by JIM WATSON/AFP via Getty Images)

President Biden's climate agenda is on the line. Here's what's at stake

Najin, a 32-year-old northern white rhino, has been retired from a breeding program aimed at saving the species after researchers found benign tumors on her reproductive organs. She is one of only two surviving northern white rhinos worldwide.

Najin, one of the world's last northern white rhinos, retires from breeding