Color-changing card trick

Richard Wiseman is a magician turned cognitive psychologist, who investigates perception, persuasion, and trickery.

I suspect that most of us think that we’re observant, which makes this Wiseman’s most impressive magic trick:

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Eruption of Mount Nyamuragira, Rift Valley context: Greg Laden

Greg Laden provides a map and valuable geographic comments on the eruption of Mount Nyamuragira in central Africa.

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