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.

Why zebras have stripes

New research suggests that stripes help zebras evade biting flies and the deadly diseases they carry. Hear from the scientists who led the study.

Countdown to calving at Antarctic ice shelf

Cracks growing across the Brunt Ice Shelf are poised to release an iceberg about twice the size of New York City. A scientific presence on the ice shelf since 1955 has an uncertain future.

Could cockroaches survive a nuclear apocalypse?

Cockroaches have a reputation for resilience, even when it comes to surviving a nuclear bomb and radiation – but will they really outlive us all?