North and South America were arranged in nearly the same positions as they are today as far back as 20 million years ago. A significant difference was that they were separated by a deep open channel called the Central American Seaway.
Today on A Moment of Science, we’ll look at how geodes form and how they collect in such complex patterns.
Just one glacier can release up to 41 tons of methane from meltwater a day during the summer months.
A newly discovered cave could very well be tens of thousands of years old, and dangerous to explore.
Humans aren't the only animals that can alter landscapes.
Geologists have found proof that a microcontinent exists near the island of Mauritius.
Zealandia, off the eastern coast of Australia, has existed for millions of years.
Why are some mountain lakes so beautiful? Thank a glacier.
It was one of the Earth's momentous times. Continents collided. Volcanoes erupted. Ocean currents shifted. Species ran amok.