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NPR's Ailsa Chang speaks to Dr. Jonathan Slotkin about the new data released by Waymo about accidents and their self-driving cars.

Pea-size clusters of human cells called brain organoids inspire both hope and fear. Experts are debating how scientists can responsibly use these bits of gray matter.

Scientists have developed an experimental way to study how human embryos implant in a uterus, which may provide new insights into why miscarriages occur and how they can be prevented.

Some Justice Department officials are following President Trump's directive to prosecute his perceived enemies. For those targeted, mounting a criminal defense against the government can be expensive.

Ukraine's president visited Mar-a-Lago Sunday. NPR's Leila Fadel talks to former Pentagon official Evelyn Farkas, now executive director of the McCain Institute, about prospects for peace.

Iran's parliament speaker warned the U.S. military and Israel would be "legitimate targets" if America strikes the Islamic Republic, as threatened by President Donald Trump.

NPR asks Michael McFaul, former U.S. ambassador to Russia, about President Trump's recent tough talk about Russian President Vladimir Putin. Trump said he's now considering new sanctions.

The House voted Thursday to renew enhanced health care subsidies that expired last year, while in the Senate lawmakers advanced a bill over authorizing military force in Venezuela.

Social media influencers tout the benefits — from weight loss to collagen production to pain reduction — and direct followers to websites to buy peptides.

The move followed Wednesday's sinking of another Iranian warship by a U.S. submarine. Australia confirmed three Australians were on that submarine.