Octopuses have two alternating sleep states, study shows

Octopuses are known to sleep and to change color while they do it. Now, a study publishing March 25 in the journal iScience finds that these color changes are characteristic of two major alternating sleep states: an "active ...

The potential economic impact of volcano alerts

The Volcano Alert Level (VAL) system, standardized by the United States Geological Survey (USGS) in 2006, is meant to save lives and keep citizens living in the shadow of an active volcano informed of their current level ...

Volcano erupts on Hawaii's Big Island, draws crowds to park

Kilauea volcano on Hawaii's Big Island roared back to life Sunday night as lava went shooting into the air, boiling away a water lake and sending a massive plume of steam, gas and ash soaring into the atmosphere.

Chinese craft returns to Earth with Moon rocks

An unmanned Chinese spacecraft carrying rocks and soil from the Moon returned safely to Earth early Thursday, completing another chapter in China's effort to become a space superpower.

Mammals share gene pathways that allow zebrafish to grow new eyes

Working with fish, birds and mice, Johns Hopkins Medicine researchers report new evidence that some animals' natural capacity to regrow neurons is not missing, but is instead inactivated in mammals. Specifically, the researchers ...

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