Why Tonga eruption was so big and what's next

People around the world looked on in awe at the spectacular satellite images of an undersea volcano erupting in a giant mushroom cloud in the Pacific. Many wondered why the blast was so big, how the resulting tsunami traveled so far, and

Omicron variant now 99.5% of US COVID cases, CDC says

Data from the Centers for Disease Control and Prevention (CDC) showed Tuesday that the omicron variant of the coronavirus is now responsible for 99.5% of U.S. cases.  Comparatively, the delta variant reportedly makes up 0.5%. The agency shows that there have been

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