“To see a world in a grain of sand”, the opening sentence of the poem by William Blake, is an oft-used…
Browsing: Earth
Atomic clocks, combined with precise astronomical measurements, have revealed that the length of a day is suddenly getting longer, and…
Deep in the Earth beneath us lie two blobs the size of continents. One is under Africa, the other under…
On December 19 1972, astronauts Eugene Cernan, Harrison Schmitt and Ronald Evans splashed down safely in the Pacific Ocean, ending…