Andrew Gillingham writes:
The railways owned the 19th century; the 20th was the age of the car. But as Alberto Contador processes up the Champs-Elysees to win the Tour de France, and as London's mayor, Boris Johnson, unveils his massive cycle-hire scheme, could this be the century of the bike?
Earth may have formed from two separate rings around the sun
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Our solar system’s rocky planets – Mercury, Venus, Earth and Mars – may
have formed from two rings around the young sun, rather than a single disc
6 hours ago



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