A Hint About How Life Made It Onto Land
Mangrove rivulus fish hate enforced water aerobics. Despite her best efforts, Giulia Rossi, a biologist who recently received her doctorate from the University of Guelph, cannot coax the fish to swim against a current in a laboratory tank. “They refuse to exercise in water,” she told me. “They just let themselves hit the back mesh.”When plucked out of water, however, the stubborn swimmers quickly whip themselves into shape.





























