BBC NEWS | Science/Nature | Fire in the sky: Tunguska at 100

BBC NEWS | Science/Nature | Fire in the sky: Tunguska at 100: "The plume of hot dust trailing the fireball gave rise to descriptions of a 'pillar of fire', which was quickly replaced by a giant cloud of black smoke rising over the horizon.

'The sky split in two and fire appeared high and wide over the forest. The split in the sky grew larger, and the entire northern side was covered with fire,' one local remembered.

'At that moment I became so hot that I couldn't bear it, as if my shirt was on fire… I wanted to tear off my shirt and throw it down, but then the sky slammed shut. A strong thump sounded, and I was thrown a few yards.'"

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