January 30, 2019

Why are the White Cliffs of Dover white?

Tiny creatures are responsible for the color of the cliffs, which stretch for eight miles (13 km) along England’s coastline. The cliffs began to form 70 […]
January 30, 2019

Why is the Grand Canyon so grand?

Carving through 277 miles (446 km) of Arizona, U.S.A, and up to a mile (1.6 km) deep in places, the Grand Canyon exposes millions of years […]
January 30, 2019

Why do diamonds last forever?

Earth’s most valuable gemstone is also its hardest natural surface. Only a diamond can scratch another diamond. These rugged rocks are forged 100 miles below your […]
January 30, 2019

What is the largest diamond?

Weighing 1.37 pounds (621 gm) and measuring more than four inches (10 cm) long when it was discovered in 1905, the Cullinan Diamond is the largest […]