Meet the Woman Who Found the Most Useful Stars in the Universe

When Dame Jocelyn Bell Burnell discovered the first pulsar 51 years ago, she revealed a new tool for solving many mysteries of the cosmos.
0:48

Stephen Hawking In Memoriam Why are we here

Stephen Hawking shares his own personal view on how to answer humanity's biggest questions
0:37

Stephen Hawking In Memoriam: The future of the Universe

Stephen Hawking provides an answer to what will be the future of the universe
1:08

Stephen Hawking In Memoriam: How was the universe formed

How did everything start may be the biggest question in front of us; here's what Stephen Hawking had to say

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