The Puerto Rican crested toad has been critically endangered for over 30 years and was once thought to have gone extinct. However, researchers have performed a first-ever procedure that could save the species – they successfully hatched a toad via in-vitro fertilization. Named Olaf, this toadlet weighs just six grams and was born using the eggs from two females in captivity and frozen semen from six wild males. Olaf was ...