We're right where we were Friday: Republicans want to make big changes to Obamacare in return for funding the government, Democrats refuse, and there's no end in sight.

The oldest baobabs are collapsing, and there’s only one likely explanation.

The president relented to political pressure on Friday, agreeing to reopen the government after 35 days without receiving money he demanded for a southern-border wall.

The fires in Australia are a case study in the realities of climate change.

The opportunity to fully disconnect is at risk in an ever-more-connected world.

Sand dunes can protect the coastline from the effects of climate change. But they’re vulnerable to intense storms.

Arizona’s Game and Fish Department killed a black bear in a mountain town last week, raising questions about the tense relationship between people and predators.