It is perhaps the rarest event in zoology: the description of a new species of ape. From the still little-known rainforest area where Vietnam, Laos, and Cambodia meet comes the northern buffed-cheeked gibbon (Nomascus annamensis), the sixth known species in its genus. Gibbons are the most prolific apes in terms of species, with the newcomer making (by some, but not all, counts) a 17th species. The rarity of the new species is not clear yet, although some gibbon species are fewer than 200 heartbeats from extinction.
Thanks to Loren Coleman for the initial pointer to this story.