Female crocodile in Costa Rica experiences virgin birth.

Scientists have discovered the first ever recorded case of a "virgin birth" in a crocodile at a reptile park in Costa Rica. The female crocodile had been isolated for 16 years before laying a clutch of 14 eggs, seven of which were viable. Genetic analysis showed that one of the eggs contained a fully-formed, but non-viable fetus that was almost identical to the mother. The discovery provides insights into the evolutionary origins of the trait and could shed light on the reproductive capabilities of dinosaurs.