Skeleton of a dinosaur with an open mouth featuring many big teeth

Meet the world’s biggest T. rex

Say hello to “Scotty.” The towering and battle-scarred Tyrannosaurus rex is the biggest yet discovered and the largest terrestrial predator known to science.

What exactly is twilight?

Twilight is that magical time between daylight and darkness. Astronomers, the experts on nighttime, recognize 3 twilights.

Animation of Bering Sea meteor, December 18, 2018.

Great images of fireball over Bering Sea

Last December 18, a big “fireball” or bright meteor exploded above the Bering Sea with more than 10 times the energy of the atomic blast over Hiroshima. Satellites saw it all.

Pool of hot water in a field.

These bacteria eat and breathe electricity

For the first time, scientists made a successful in situ collection of bacteria living in hot springs in Yellowstone National Park and using an unconventional source – electricity – for food and energy.

A new species of killer whale?

In January, scientists captured footage of what might be a new species of killer whale near Antarctica.

Dinosaurs on a floodplain 66 million years ago.

Dinosaurs thrived before fatal asteroid impact

Scientists have debated whether the dinosaurs were already in decline before a massive asteroid impact finished them off 66 million years ago. New research shows they were thriving in their final days.

Green iceberg

Why are some icebergs green?

A new idea might solve a decades-long scientific mystery about why some Antarctic icebergs are tinged emerald green rather than the normal blue.

Thousands of tiny ice quakes shake Antarctica at night

Stay overnight on an Antarctic ice shelf, and you might feel the shaking from thousands of tiny quakes as the ice re-forms after melting during the day.

How can I see a green flash?

It’s said that once you’ve seen a green flash, you’ll never go wrong in matters of the heart. Here’s all you need to know to be able to see one, plus great pics!

Watch right whale and calf interact with dolphins

Watch an endangered right whale mom and her baby interact with a group of curious dolphins. The video was shot via drone by NOAA researchers.

Big bird taking off from a wooden box filled with sticks on a tall pole.

Ospreys’ recovery is global conservation success story

Chemical pollution and hunting pushed ospreys – which are large, hawk-like birds – to the edge of extinction. Now they’ve rebounded and can be spotted worldwide, often nesting on human-made structures.

First photos in 100 years of black panther in Africa

There have been reports of black panthers in Africa for more than a century, but only 1 confirmed with photographic evidence – in a 1909 photo taken in Ethiopia – until now.

A huge black bee next to a honeybee

Found: World’s biggest bee

Last seen in 1981 and thought lost to science, Wallace’s giant bee has been rediscovered in the forests of Indonesia.

Bees change scent as they age

A new study finds that honey bees develop different scent profiles as they age, and guard bees respond differently to returning foragers than to younger bees who’ve never ventured out.

Great white shark genome decoded

It’ll help unlock mysteries about these iconic apex predators – explaining their “superpowers” like wound-healing and long lifespans – and why they’ve thrived more than 400 million years.

Large, flatish rocks in shallow blue water.

When and where did Earth get its oxygen?

Earth’s atmosphere contains about 21% oxygen today. Plants produce it, and animals – including humans – breathe it. Ancient rocks provide clues about when the oxygen in Earth’s atmosphere began to arise.

These ice-covered Chilean volcanoes could erupt soon

Heightened volcanic activity in the Nevados de Chillán prompted Chilean authorities to issue an orange alert in anticipation of an eruption.

When is the next leap year?

If there were no leap years, eventually February would be a summer month for the Northern Hemisphere. 2019 isn’t a leap year, but 2020 will be.

Want cleaner roadside air? Plant hedges

To improve air quality near urban roads, scientists from the Global Centre for Clean Air Research recommend planting hedges that can trap air pollutants.

Earth as seen from space.

New NASA consortium to study how life began

How did life originate on Earth and, possibly, other worlds in space? A new NASA consortium has the goal of probing one of nature’s most perplexing mysteries.