The arctic tern carries out the longest migration of any creature on Earth a journey of more than 36,000 kilometres (or 22,000 miles) from the Arctic to the Antarctic and back again, each year!
Anything goes
Anything goes Shoaling fish show no preference for being in a
shoal of fish of the same species, or a shoal containing a few
different fish, as long as the fish are about the same size as
them. This prevents predators from singling out any fish that
stands out from a shoal, such as one much smaller or larger than
its companions. 9 OCTOBER 1999, P. 29
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