T. rex had an air conditioner in its head

How did the huge dinosaurs stay cool?  According to a new study, they did it much as today’s alligators do, with a built-in ‘air conditioner’ on the top of their skulls.

Water eruption from an active geyser.

Yellowstone’s Steamboat geyser breaks record

With 33 eruptions as of August 27, Steamboat geyser in Yellowstone National Park is having an exceptionally active year.

Model of a big white penguin next to photo of a woman.

Monster penguin was as tall as a person

An extinct species of giant penguin – over 5 feet (1.6 meters) tall – has been identified from fossils found in New Zealand.

Hurricane Dorian: Why it’s so destructive

Dorian, the 2nd most powerful Atlantic hurricane on record, has devastated the Bahamas, with the death toll expected to rapidly rise as rescue work gets under way.

Wow! Night skies and petroglyphs

Gorgeous night skies over North America’s best petroglyphs and ruins – and don’t miss 2018’s Super Blue Moon lunar eclipse (at 1:03) – in Skyglow’s newest video.

Evolution doesn’t proceed in a straight line

If you go by cartoons and T-shirts, you might think evolution proceeds as an orderly march toward a preordained finish line. But evolution has no endpoint in mind.

Hurricane Dorian viewed from space

NASA astronaut Christian Koch snapped this image of Hurricane Dorian from the International Space Station on Monday, September 2, 2019. The station orbits more than 200 miles (300 km) above Earth.

Why the Amazon is burning: 4 reasons

Nearly 40,000 fires are burning in Brazil’s Amazon rainforest, the latest outbreak in an overactive fire season. Don’t blame dry weather, say environmentalists. These Amazonian wildfires are a human-made disaster.

In 1966, 1st photo of Earth from the moon

NASA released this 1st moon photo of Earth on August 23, 1966, via its spacecraft Lunar Orbiter 1. Years later, it used digital technology to restore the photo and reveal more detail.

Snow algae thrives in extreme conditions

On tall ice structures high in the Chilean Andes, researchers found algae growing on snow. They don’t entirely understand how the algae are able to bloom.