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Many animals get their external marking--like, feathers, hair or scales-from genetics. But it turns out, the crocodile gets its head patterns differently.

The departure adds to a string of recent personnel changes at the Department of Homeland Security, a year into President Trump's administration.

State leaders, especially those with ambitious climate goals, are trying to decide between slowing climate change and the cost of living, especially on an ever-warming planet.

Sky-high gas prices have drivers going out of their way for discounts at the pump. Oil executives warn that even higher prices might be on the horizon.

Vladimir Putin won re-election to a fourth term as president in a landslide last year. Now, protests are breaking out around the country as dissatisfaction with the government grows.

Artificial intelligence on the agenda for President Trump's upcoming meeting with Chinese President Xi Jinping.

Ahead of the Winter Olympics in Milan in February, curling superfans turn out in Sioux Falls, S.D., for trials to determine which U.S. team will compete in "chess on ice" against the world.

As a new year begins, a hike up Africa's highest peak is a reminder that slowing down is sometimes the key to success.

Louisiana Sen. Bill Cassidy was one of seven Republican senators who voted to convict President Trump. Now he's running for reelection in a race that will test Trump's hold on the GOP.

SNL guest host Dan Levy got nudged by a pool noodle! That's one way to enforce physical distancing. We've got other tips at keeping your 6 feet — something humans are not very good at.