The coconut crab (Birgus latro) can weigh up to 4 kilograms. It has enormous claws with which it can pick up objects that are seven times heavier that it is.
Recently, scientists measured the strength of this crab. While humans have a grip strength of 300 newtons on average, a coconut crab weighing 2 kilograms almost reached 1800 newtons. Hence, the researchers suggested that a fully-grown coconut crab “could thus be expected to exert a crushing force of more than 3000 newtons,” New Scientist says.
While the Darwinian explanation for the crab’s Hercules-like grip invokes dietary demands, just how many crabs passed away before evolution’s blind watchmaker finally thought of a solution and gave the poor crab a chance to have a coconut for lunch?