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Despite new pledges to cut emissions, the world is not on track to hit a key climate change target of limiting warming. Scientists warn a planet that heats up more than that will look very different.

A new Alzheimer's drug isn't reaching many patients. Doctors say reasons include its high cost, and lingering questions about its effectiveness.

Los Angeles is among a growing number of cities across the U.S., including San Francisco and New York City, requiring people show proof of vaccination to enter various types of businesses and venues.

A newly formed rebel alliance led by the Tigray People's Liberation Front is within striking distance of Addis Ababa. A failed state could displace millions of people and stoke more ethnic violence.

Drought and extreme heat that scientists link to climate change are altering the UNESCO-protected marshlands. Iraq's average annual temperatures are increasing at nearly double the rate of Earth's.

Guyana, one of South America's poorest countries, is under severe threat by rising seas. That had made it a champion of climate action, but it all changed when ExxonMobil found oil off its waters.

Astroworld Festival calls to mind other rare but traumatic incidents at concerts and festivals throughout the last half-century. Here's a timeline of those tragedies.

The ultraviolent scenario is made up, but there are economic themes in the hit Netflix survival drama that are all too real in South Korea.

Environmentalists are expected to stage large protests are expected in Glasgow, Scotland, today, demanding more action to combat climate change.

Scott Simon speaks to journalist Umaru Fofana about the deadly tanker explosion outside Freetown, Sierra Leone today.