The curvature only becomes visible from a vantage point that is at least 40 miles above the Earth's surface, Steffen explained. "You have to be about a percent or so higher than the radius of ...

as well as robust lower bounds on the curvature radius of the Universe and its minimum size, while allowing for the possibility of an evolving dark energy component. Because flat models are favoured ...

First, what is the radius of the Earth ... Based on my calculation above, it might actually be possible to measure the curvature of this terminal. My very first idea was to use the top image ...