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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.

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.

Iranians made phone calls abroad for the first time in days Tuesday after authorities severed communications during a crackdown on nationwide protests that activists say killed at least 646 people.

Russian cellist Anastasia Kobekina releases her Sony Classical debut album — featuring composers from the 17th century to today whose works evoke Venice.

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.

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

The second son of the late supreme leader keeps a low profile. But he's long been viewed as wielding his power behind the scenes, from crushing dissent to influencing presidential elections.

Jessica Pegula is seeded No. 6 and Emma Navarro is seeded No. 13. Both women are New York natives.

You nominated 300 cool stories of scientific surprise for Skunk Bear's Golden Mole Award. Our shortlist has it all: circuits painted with light, imperceptible genitalia, and a terrifying frog.

How the Supreme Court's immunity ruling may re-shape the presidency. A proposed federal rule could offer protection from extreme heat to millions of workers. Ransomware is becoming a global crisis.