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Some unusual meteorites suggest that Earth got its water at its start, rather than forming dry and being watered by comets later on.

Atlantic journalist Alexis Madrigal says millions of at-home saliva tests for the coronavirus could be the key to a safe reopening — even if they are less accurate than the traditional PCR tests.

"We are in a period of epidemic growth," Prime Minister Jean Castex said. "We want to do everything to avoid a new lockdown." The order goes into effect Friday.

NPR's Ailsa Chang speaks with State Fire Marshal H. "Butch" Browning about search-and-rescue efforts after Hurricane Laura hit Louisiana on Thursday morning.

President Trump is scheduled to address the final night of the Republican National Convention from the South Lawn of the White House in what could be a pivotal speech ahead of the November election.

Louis DeJoy reportedly tells officials he's setting up a task force to make sure each mail processing plant has sufficient capacity to handle the expected surge in mailed ballots this year.

A vaccine against the coronavirus needs to keep people from getting very sick and dying. But preventing the spread of the disease is also important, and vaccines delivered by nasal spray may do that.

The Metropolitan Museum of Art is scheduled to reopen to the public on Saturday, August 29th. We go behind the scenes to learn how curators and staff hope to pull it off.

In 13 U.S. cities this summer, volunteers are capturing detailed measurements that will include the heat index people experience. Cities will use the new heat maps to help cool the hottest spots.

Abe announced he is leaving office before his term ends in 2021 because of poor health. His legacy is controversial and a successor is unclear.