A compass needle points north. Almost everyone knows this and almost nobody knows what it means.
It does not point at the North Pole. The geographic North Pole is a…
Picture the two places side by side. On one side of the Atlantic, the Sahara: the largest hot desert on the planet, stretching across the northern third of Africa, defined…
Look at Earth from orbit today and you see the famous blue marble: oceans, cloud swirls, green continents. Run the clock back roughly 700 million years and an observer in…
Source: Wikipedia
On a remote, windswept stretch of Arctic tundra in the far north of Russia, near the border with Norway, there sits a rusted metal cap bolted over a hole…