A white dwarf has about half the mass of the Sun, but that mass is compressed into a volume roughly the size ... deform a planet, and the friction causes the material being deformed to heat up. An ...

The claim is that the traditional Mercator map of the world shows the African continent as hardly any bigger than Europe, whereas in reality it is at least four times as big.

By Gwynne Dyer Two Africa-based advocacy groups, ‘Africa No Filter’ and ‘Speak Up Africa’, launched a “Change the Map” campaign in April. “When whole generations, in Africa and elsewhere, learn ...