Cluster-Flock Fatigues Pigeons - Naked Scientists NewsFLASH - 27.06.11 - a podcast by Dr Chris Smith

In this week's Naked Scientists NewsFlash, a new TB vaccination that stands out on it's own, how babies make sense of broken toys, and why flying in a flock may be exhausting for pigeons. Plus, how a nap in a hammock leads to deeper sleep.

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