Lemurs

Teams of researchers are trying to uncover the cause of death for 31 Verraux's sifakas Lemurs—which could spell the end for the critically endangered species.

• By Edward Carver

Ringtailed lemurs, just like humans, reserve conversation for those they feel more connected with.

• By Madeleine Thomas

The world’s most demonic lemur is also its most endangered. Meet the creature with the ugliest finger on the planet.

• By Jason Bittel