Last week's flight-focused special wasn't quite as jaw-dropping as the first installment, but this week was back on track. Silk. Yiiii.

Those wee beasties use it to make deadly bolas, strum music to calm mates that are ten times their size, fly hundreds of kilometers, or just attach themselves to their mothers in giant cutesy creches.

Next week's one on weird collaborations between loads of plants and invertebrates looks like it should be a winner too.
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