The Origin of Big

On this happy anniversay–the 150th anniversary of the Origin of Species–let us contemplate one of evolution's great works: the origin of giants.

Whales are the biggest animals to ever live. Blue whales can get up to 160 tons–about as heavy as 200 grown men. They are trailed in the rankings by the fin whale and a few other related species of whales. There are no lobsters in their ranks, no clams, no rodents. All these giants feed in much the same way. They swallow up water and filter it...