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When was Earth’s 1st snow?

A new study suggests our planet got its 1st snowfall about 2.4 billion years ago, after a lot of land rose swiftly from the sea and set off dramatic changes on Earth.

Scientists track major freshwater change

‘What we are witnessing is major hydrologic change,’ they said. Over 14 years, Earth’s wet land areas got wetter. Dry areas got drier. They also reported multiple hot spots resulting from groundwater depletion.

A case against killing spiders

An entomologist explains why it’s a good idea to be nice to the spiders you encounter and consider a live-and-let-live policy.

Top tips for poison ivy

Summer is a great time to frolic in the woods, but look out for poison ivy, oak, and sumac! Top tips for summer itch-prevention.

Situation at Kilauea Volcano ‘steadily worsening’

A large explosion happened Friday night into Saturday at Hawaii’s Kilauea Volcano. The 1st serious injury is reported. USGS warns of the release of toxic gases in a plume called a laze, which happens when molten lava hits sea water. Latest images and videos here.

Scientists measure rise in ozone-destroying chemical

Report on CFC-11 – an illegal chemical responsible for ozone-depletion in Earth’s atmosphere – now apparently on an upswing again. Meanwhile, new direct evidence the ban on CFCs is working and the ozone hole is recovering.

Shelf cloud over New York

A squall line of severe thunderstorms swept over New York City and the surrounding area last Tuesday, creating dramatic skies.

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You can’t walk on these cloud streets

Cloud streets are long rows of cumulus clouds oriented parallel to the direction of the wind. Check out these cool images!

Scientists discover a new type of magnetic event

They were working with spacecraft data, using a new technique to analyze it. They found a new type of magnetic event in the realm just beyond the boundary of Earth’s magnetic field.

The Female Bird Song Project

There’s a false notion that female birdsong is rare in comparison to male birdsong. But lady birds sing, too. You can participate in a new project that aims to collect more recordings of female birds.