Dr. Angela Collier, theoretical physicist, discusses aliens, crackpots, and Avi Loeb
18
votes
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Bygone visions of cosmic neighbors
3 votes -
The entire Soviet rocket engine family tree
8 votes -
Starbase factory tour with Elon Musk: Part II
8 votes -
Starbase factory tour with Elon Musk: Part I
6 votes -
Timelapse of ten years of the Sun - "A Decade of Sun"
8 votes -
Tory Bruno, Lunar Aspirations and Industry Mentoring, Laurel, Maryland, February 28, 2020
6 votes -
How rockets are made (Rocket factory tour - United Launch Alliance)
6 votes -
Are aerospikes better than bell nozzles?
7 votes -
SpaceX 150 Meter Starhopper Test
19 votes -
Incredible 4K video of Earth from the ISS
7 votes -
Fermi Paradox great filter: Rare intelligence
9 votes -
Mining water on Mars
6 votes -
SpaceX launch CRS-15 to resupply the International Space Station
11 votes