The First Continent On Earth
Three billion years ago, Ur became the lone (and possibly first) supercontinent on Earth. It was probably smaller than Australia. Two billion years later, it merged with the continents Nena and Atlantica to form Rodinia. Parts of Ur now exist as segments of Africa, Australia, and India. Some scientists believe that Vaalbara, a theoretical supercontinent, may have preceded Ur.
Key Facts In This Video
Vaalbara is a theoretical supercontinent that may have been the first supercontinent on Earth. (1:04)
The breakup of the supercontinent Rodinia may have caused an ice age known as "Snowball Earth." (2:47)
Soon after the dinosaurs went extinct, Europe and North America were still part of the same continent. (5:43)