Video: Lightning photobombs a double rainbow

Amazing double rainbow arcs across the sky. Lightning gets in on the act.

View from space: Southwestern U.S. at night

Two cool nighttime photos by astronauts aboard the ISS. Check out the bright city lights.

How often might Hawaii get a monster tsunami?

Scientists say that the tsunami that hit Japan in 2011 was a thousand-year event. A monster wave might strike Hawaii about as often.

New seafloor map reveals thousands of seamounts

A new global map of the ocean, made with satellite data, reveals thousands of previously uncharted seamounts.

Hundreds of millions of South Asians at risk from glacier melt

Hundreds of millions of people in countries like India, Pakistan, Nepal and Bangladesh depend on the Hindu Kush Himalayan glaciers for food, energy and water.

First-ever image of 5th order rainbow!

The fabled quinary or 5th order rainbow is made by sunlight reflected five times inside raindrops. Now, for the first time, we have an image of one.

Earth’s last magnetic reversal took less than 100 years

A study demonstrates that Earth's last magnetic reversal - 786,000 years ago - happened in roughly the span of a human lifetime.

San Francisco Bay area overdue for a big quake

Four urban sections of the San Andreas Fault system in Northern California have stored enough energy to produce major earthquakes, according to a new study.

This hummingbird video will melt your heart

Hummingbirds playing in a fountain. Toward the end, listen for the little clicks and chirps.

Crocodiles work as a team to hunt their prey

Crocs are able to conduct highly organized game drives. They might be second only to humans in their hunting prowess, says a researcher.

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