EarthSky Voices
Spacecraft on a brown surface.

Marsquakes: InSight lander shows active faults in planet’s crust

The results from NASA’s Mars InSight lander’s first 10 months on the Martian surface have been published in a series of papers.

Did early humans in Africa interbreed with a mysterious, extinct species?

New research suggests that early humans in Africa interbred with a ghost population that likely split from the ancestors of humans and Neanderthals between 360,000 and 1.02 million years ago.

Sideways snowman shape on a black background.

Why does Arrokoth look like a snowman?

Meet Arrokoth – the most distant object yet visited by earthlings – seen by the New Horizons spacecraft in early 2019. It’s very old, one of the first generation of objects in our solar system. Here’s why it looks like a snowman.

Panda eating a piece of bamboo.

Save the giants, save the planet

Protecting large animals such as elephants and whales, and large plants like the sequoias, has a disproportionate positive impact on the health of the planet and resilience to climate change.

Splotches of bright colors and sparkly lights.

New clues in the search for the universe’s oldest galaxies

An astronomer reports on a very old galaxy cluster – labeled XLSSC 122 – whose light has taken 10.4 billion years to travel across the universe to us.

Poll reveals climate change as most important issue for U.S. adults

A Harris Poll survey – conducted online in December on behalf of the American Psychological Association – reports that more than half of U.S. adults (56%) cite climate change as the most important issue facing the world today.

Australian smoke plume sets records

The recent wildfires in Australia sent one of the largest plumes of smoke higher into the the stratosphere than satellites have ever before observed.

Ötzi the Iceman’s final days

Scientists have identified ancient mosses in, on and around the 5,300-year-old glacier mummy that add to the story of the final 48 hours before his murder.

Treeless, ruddy landscape

This Australian meteor crater is oldest known, says study

“We found the world’s oldest asteroid strike in Western Australia. It might have triggered a global thaw.”

Olive-green oval with a bright ball in the center.

Why planets have size limits

Why isn’t there an endless variety of planet sizes in the universe? Why are most planets like those in our solar system: small and rocky, or big and gaseous?