Carl Sagan

American astrophysicist, cosmologist, author and science educator more on Wikipedia

Stunning birth of a star and more top space and science stories this week 3yrs
A Broken Cable Has Wrecked One of Earth's Largest Radio Telescopes 4yrs
How we met: 'I think gay men are often able to negotiate an open marriage' 4yrs
How we met: 'I think gay men are often able to negotiate an open marriage' 4yrs
Mysterious dark patches in Venus’ clouds are affecting the weather th 5yrs

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