How to Move the Sun: Stellar Engines
https://www.youtube.com/watch?v=v3y8AIEX_dU
The Largest Star in the Universe – Size Comparison
https://www.youtube.com/watch?v=3mnSDifDSxQ
What Do Alien Civilizations Look Like? The Kardashev Scale
https://www.youtube.com/watch?v=rhFK5_Nx9xY
Why Are You Alive – Life, Energy & ATP
https://www.youtube.com/watch?v=QImCld9YubE
Could Solar Storms Destroy Civilization? Solar Flares & Coronal Mass Ejections
https://www.youtube.com/watch?v=oHHSSJDJ4oo
Is It Too Late To Stop Climate Change? Well, it’s Complicated.
https://www.youtube.com/watch?v=wbR-5mHI6bo
What if We Nuke the Moon?
https://www.youtube.com/watch?v=qEfPBt9dU60
When Time Became History — The Human Era
https://www.youtube.com/watch?v=CWu29PRCUvQ
Worst Nuclear Accidents in History
https://www.youtube.com/watch?v=Jzfpyo-q-RM
Geoengineering: A Horrible Idea We Might Have to Do
https://www.youtube.com/watch?v=dSu5sXmsur4