Granite planet

Granite is the most common rock in continental crust, but only on Earth. So far, scientists have not found significant amounts of granite on any other planets. What makes ours different? Water. Learn how our oceans have shaped the world we live on in my blog post for Nautilus.

When Earth got its water

Believe it or not, scientists still don’t know exactly how or when Earth got its water. Most think water must have come later, delivered by meteors or comets, but a new study suggests it may have been present from our planet’s birth. Find out why in my podcast for Scientific American’s 60 Second Science.