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.
It was one of the Earth's momentous times. Continents collided. Volcanoes erupted. Ocean currents shifted. Species ran amok.
A plant's nightlife may not include dining and dancing, but it does play an important role in its flowering season.
We can all hum the song from the "Jungle Book", but what really are the bare necessities for a big bear?
On the American plains, squirrels are the food of choice for both the coyote and the badger.
Most people know about the mass extinction of the dinosaurs, but did you know there have been about twenty-three mass extinctions since life began on earth?
According to one study, we should be thankful for Earth's inner heat, because without it, much of the United States would be underwater.
Scientists try to crack the mystery of dragonfly migrations.
Brown-headed cowbirds are robin-sized black birds whose range covers most of North America. From a people’s point of view cowbirds are what we might call deadbeat parents. Cowbirds lay their eggs in the nests of other bird species, and the cowbird nestlings are raised by the foster parents. Since the cowbirds spend their formative months with birds of an entirely different species which has separate habits, songs, etc., how does a cowbird know it’s a cowbird? Learn more on this Moment of Science.
Is Chicago really sinking? Find out on this Moment of Science.