What can seabed cores tell us?
To learn how the Earth responded to climate change 50 million years ago, and how it may react to future warming, scientists are plumbing the seafloor to unlock ancient secrets. Here's how they're doing it. LEARN MORE >
How do you build a sundial?
Step 1: Determine what the latitude is for the place where you live by locating your town on a map that features latitude and longitude. LEARN MORE >