A Porsche driver who was spotted on the A12 inhaling gas from a green balloon has been arrested on suspicion of drug driving.

Lifting the contraption required 3 million cubic feet of hydrogen, an extremely flammable gas. The flight ended in disaster when the balloon ripped, plummeted towards earth, and burst into flames ...

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The whole thing should go a bit like this: the balloon's initial buoyant gas would be constantly replenished with CO and O2 taken from Venus' atmosphere, and converted for use using the solid ...