Race to learn about omicron

Experts said the new variant's high number of mutations could make it more transmissible. ABC News’ Em Nguyen reports.

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Tonga volcano eruption, voting rights, Tahitian coral reef: Week in Photos.

Tonga volcano eruption, voting rights, Tahitian coral reef: Week in Photos.

A look at the week's top photos from around the globe.

ABC News Live: Omicron surge plateauing in several states.

ABC News Live: Omicron surge plateauing in several states.

Plus, Kroger and the union reach a tentative agreement to end their strike, and Emmy-winning actor and comedian Louie Anderson dies at age 68 after his battle with cancer. WATCH the ABC News Live Stream Here: SUBSCRIBE to ABC NEWS: Watch More on L...

Feel Good Friday: Jamaican bobsled team

Feel Good Friday: Jamaican bobsled team

A four-man Jamaican bobsled team will compete in the Winter Olympic Games for the first time in 24 years.

What we know about the volcanic eruption near Tonga.

What we know about the volcanic eruption near Tonga.

Mike Poland, a geophysicist from the U.S. Geological Survey, shares the eruption’s impact and possible dangers ahead.

At least 17 dead after massive explosion in western Ghana.

At least 17 dead after massive explosion in western Ghana.

The blast happened when a vehicle carrying mining explosives collided with a motorcycle.