Hawaii

For some NASA scientists, the extreme environments they study aren't on a distant planet or moon — they're right here on Earth.

Boaters, cruising off the coast of Hawaii, came across what looked like a giant, used tissue floating in the water.

Where does your state rank?

Chilly Massachusetts has bumped sunny Hawaii from the top spot as the healthiest state in the nation, a new report finds.

Footage of lava barreling toward and then melting the lens of a GoPro camera may be one of the hottest (literally) recordings online.

A spectacular outburst of jet lightning, also known as "gigantic jets," was captured by the Gemini Observatory’s cloud camera on Mauna Kea in Hawaii on July 24, 2017.

A rare parasitic worm that can infect people's brains is causing concern in Maui.

The Earth's mantle retains traces of primeval materials that are older than the moon, which formed a scant 100 million years after the solar system's coalescence.