Space
In this short talk TED Fellow Sarah Parcak introduces the field of space archeology using satellite images to search for clues to the lo...View full lesson
How likely is it that a massive asteroid will do major damage to Earth and its inhabitants What about the sun is it d...View full lesson
Grizzly bears have adapted cleverly to their diminishing habitat by developing a mostly vegetarian diet in sync with p...View full lesson
On October 4 1957 the Soviet Union launched the satellite Sputnik and with it an international space race. The United...View full lesson
If you were to orbit the Earth youd experience the feeling of free fall not unlike what your stomach feels before a bi...View full lesson
Space is where things happen. Time is when things happen. And sometimes in order to really look at the universe you ne...View full lesson
View part 1 here
Light always travels at a speed of 299792458 meters per second. But if youre in motion too youre go...