Thoughts on the future of humanity, 49 years on from Apollo 11

It is 49 years, this weekend, since Neil Armstrong and Buzz Aldrin stepped on the Moon. And it was an incredible achievement – not just for the United States, but for humanity as a whole. For the first time in the history of the world, we had left it – and stepped on another celestial … More Thoughts on the future of humanity, 49 years on from Apollo 11

How GPS finds you and lets Google send you adverts

If both Special and General Relativity didn’t work precisely as Einstein said it did, GPS would be far less accurate than it actually is. Like, way off, meaning those auto-drive cars wouldn’t even get to the right road. Or any road. And we’d all be lost. Let me explain. GPS works by very precise distance … More How GPS finds you and lets Google send you adverts