Who developed the Polio Vaccine?

Big Ivan, better known as Tsar Bomba, was 57 Megatons of Soviet might. That’s 1,400 times Hiroshima and Nagasaki combined and ten times the entire combined firepower expended in WWII.

The new height of Mount Everest is 8,848.86m (29,032 ft). The world’s highest mountain Mount Everest is 0.86m higher than had been previously officially calculated, Nepal and China have jointly announced. Until now the countries differed over whether to add the snow cap on top. The new height is 8,848.86m (29,032 ft). China’s previous official measurement of 8,844.43m had put the mountain nearly four meters lower than Nepal’s. Everest stands on the border between China and Nepal and mountaineers climb it from both sides. Officials at Nepal’s foreign ministry and department of the survey said surveyors from both countries had co-ordinated to agree on the new height.