The artificial bumps on helicopters are smaller than those on a humpback whale; they have a diameter...

image:105898:0::0

Image uploaded by Elizabeth Batt

2012-02-02 16:22:40

The artificial bumps on helicopters are smaller than those on a humpback whale; they have a diameter of six millimetres and weigh just 0.04 grams.

image:105898:0::0

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