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Wednesday marks the 25th anniversary of the Mount St. Helens explosion. An observatory that overlooks the crater has just reopened and volcano enthusiasts are flocking to visit.

Forty years ago, two astronomers heard noise on a radio telescope that bolstered the Big Bang theory of the universe's origins. Arno Penzias and Robert Wilson recall their Nobel Prize-winning discovery.

In cities that were quickly encircled and occupied in the early days of the war, it was too dangerous to leave the house – let alone make an escape.

The delays in routine cancer screenings is leading to more advanced cancers that are harder to treat.

More older adults and people with disabilities are choosing to stay in their homes. But a shortage of home health aides is making it increasingly difficult to do so.

The largest of the seven wildfires has already burned more than 200,000 acres. And tens of thousands of residents have been forced to evacuate.

Illinois law bans schools from fining students as discipline, but a new investigation from the Chicago Tribune and ProPublica finds police have been doing it for them.

Electric vehicles and other new technologies that may help alleviate climate change sometimes rely on rare metals and minerals that can be found at the bottom of the ocean.

In remarks before a virtual Global COVID-19 Summit, President Biden has commemorated 1 million American lives lost to the virus.

Inflation slowed slightly last month, according to the latest data from the Labor Department, from 8.5% to 8.3%. But prices are still way up compared to last year and few workers are getting an 8% raise to keep pace.