Earth’s Oxygen Could be Making the Moon Rust

It takes oxygen to make iron rust. So when scientists discovered hematite spread widely through lunar high latitudes, they were…

4 months ago

Did Snowball Earth Happen Because of a Sudden Drop in Sunlight?

Hundreds of millions of years ago, Earth went through two episodes of severe glaciation. These two episodes—the Sturtian and the…

5 months ago

Lava Tubes on the Moon and Mars are Really, Really Big. Big Enough to Fit an Entire Planetary Base

Could lava tubes on the Moon and Mars play a role in establishing a human presence on those worlds? Possibly,…

5 months ago

What Cracked the Earth’s Outer Shell and Started its Plate Tectonics?

Earth's lithosphere is made up of seven large tectonic plates and a number of smaller ones. The theory of plate…

6 months ago

It Looks Like There are Still Active Volcanoes on Venus

Venus' surface is no stranger to volcanoes. Radar images show more than 1,000 volcanic structures on the planet. But for…

6 months ago

Earth’s Magnetic Field is Changing Surprisingly Quickly

The Earth's magnetic North pole has been moving awfully fast in recent years. But there's nothing to worry about.

6 months ago

Why Lava Tubes Should be Our Top Exploration Priority on Other Worlds

When magma comes out of the Earth onto the surface, it flows as lava. Those lava flows are fascinating to…

6 months ago

That Strange Gel-Like Material Discovered by China’s Lunar Rover? It’s Just Rock

In January 2019, China landed its Chang'e 4 mission on the Moon's far side. The Yutu-2 rover got busy exploring…

6 months ago

It Was Almost Certainly an Asteroid Impact that Wiped Out the Dinosaurs. In Fact, Volcanoes Might Have Helped Life Recover

It seems almost certain that an asteroid impact wiped out the dinosaurs. But only almost. Another competing theory won't completely…

7 months ago

Deep Down in Ocean Worlds, it’s Difficult to Tell Where the Oceans End and the Rock Begins

We all know what water is. And what rock is. The difference is crystal clear. Well, here on Earth it…

7 months ago