Imagine you are a visitor from another world and you have come to earth for one semester. You have been given the mission of learning enough to be able to make the entry under "Planet Earth" in the ...
Most of them were deduced many years ago and represent some of the first specific inquiries into the nature of the planet we live on. Even these gross external properties can be used to infer quite a ...
Parents need to know that Planet Earth is a flat-out gorgeous high-definition nature series that uses cutting-edge film equipment to capture never-before-seen animal behavior from around the world.
When approaching Earth, asteroids tend to do one of two things: Most of the time, they miss. Sometimes, they hit, leaving a bright streak in our planet’s sky or a gruesome new wound in its crust.