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POPSThe giant anvil-shaped cloud hovering 75,000ft above Earth "A giant, anvil-shaped cloud bubbles up towards the Earth's stratosphere, looming over West Africa. The amazing formation would be invisible to anyone on the ground and would even be obscure from a regular passenger jet since they can reach up to 75,000ft. But astronauts captured the astonishing picture from hundreds of miles up as they orbited the globe on the International Space Station. Anvil clouds are formed mostly from ice and normally form in the upper parts of thunderstorms. They get their shape from the fact that rising warm air in thunderstorms expands and spreads out as the air bumps up against the bottom of the stratosphere. Streaks of snow are often seen falling out of the edges of anvils. This light snow usually evaporates as it falls through the relatively dry air surrounding the upper part of the thunderstorm."
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POPSChina doctor reveals 100 rules for would-be spacemen China sent its first man to walk in space in September last year. Zhai Zhigang, the son of a snack-seller, unveiled a small Chinese flag in space, helped by colleague Liu Boming, who also briefly popped his head out of the capsule. The space walk was a step toward China's longer-term goal of assembling a space lab and then a larger space station.
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