[Just look at what this White man figured out using an ink pen as his only writing tool. I didn't even know about the 3rd law. You can weigh planets and moons using this formula from 400 years ago. Jan]

Here’s the video: https://www.youtube.com/watch?v=KbXVpdlmYZo

[This is an amazing concept when you see it in action and yet this man figured this out using nothing but an ink pen. I find it incredible to think that he was able to come to this conclusion. Jan]

Here’s the video: https://www.youtube.com/watch?v=qd3dIGJqRDU

[This man only had an ink pen and paper to work on. I didn't even know about his Third Law. With it you can weigh the Moons of planets. It's unbelievable what he came up with. Jan]

Here’s the video: https://www.youtube.com/watch?v=KbXVpdlmYZo

[I like this guy a lot. Jan]Here’s the video: https://www.youtube.com/watch?v=st6bxU6WmPE

Here’s the video: https://www.youtube.com/watch?v=Bw0IxexIiIw

Here’s the video: https://www.youtube.com/watch?v=QtxjatbVb7M

[This guy is good. Jan]

Here’s the video: https://www.youtube.com/watch?v=7QVm_50-BDg

[This is something I've been aware of for many years and the more I look into the long history of life on Earth I tell you that life is a very fragile thing in a very dangerous universe. Jan]

Here’s the video: https://www.youtube.com/watch?v=vT1QPuNwfhw

Here’s the video: https://www.youtube.com/watch?v=SEvs4zgVr0E

Here’s the video: https://www.youtube.com/watch?v=Ov98y_DCvRY