Questioning the universe - Stephen Hawking
- 81,934 Views
- 2,240 Questions Answered
- TED Talk
Could there be intelligent life on other planets? This question has piqued imagination and curiosity for decades. Explore the answer with the Drake Equation -- a mathematical formula that calculates the possibility of undiscovered life.
On October 4, 1957, the Soviet Union launched the satellite Sputnik and, with it, an international space race. The United States and the Soviet Union rushed to declare dominance of space for 18 years, until the two countries agreed to a more collaborative model. The real winner? Science. Jeff Steers describes the history -- and the benefits -- of the space race.
If you were to orbit the Earth, you’d experience the feeling of free fall, not unlike what your stomach feels before a big dive on a roller coaster. With a little help from Sir Isaac Newton, Matt J. Carlson explains the basic forces acting on an astronaut and why you probably shouldn't try this one at home.
Create and share a new lesson based on this one.
More from Out Of This World
Why the Moon turns red during a total lunar eclipse
Lesson duration 03:09
Look Up! Jupiter is at its closest to Earth in 59 years
Lesson duration 04:27
How the James Webb Space Telescope will unfold the universe - John C. Mather
Lesson duration 08:48
Are the Northern Lights dangerous?
Lesson duration 05:10