回視聴
1:09:22
A VERY soft spoken British man tells you interesting space facts while you sleep
11:55:01
Sunita Williams Landing LIVE: Sunita Williams Returns to Earth | Butch Wilmore | NASA |SpaceX
1:07
Hard Science & Soft Culture, All in One Frame - TimeLapse EP 3
5:38
Hawking's black hole paradox explained - Fabio Pacucci
4:22
Hard & soft water | Environmental Chemistry | Chemistry | FuseSchool
1:45
How Do Secular Scientists Deal with Soft Tissue in Fossils? | Creation Q&A: Campus Edition
4:58
Why Is Ocean Water Salty? | Earth's Ocean | Dr Binocs Show | Peekaboo Kidz
10:55
Hard sci-fi vs soft sci-fi || measuring science fiction hardness
