Cue the friendly roughhousing.

Officials at the National Zoo said that while the panda cub’s cause of death was still being determined, vets had found fluid in its abdomen and abnormalities in its liver.

In today’s Two Minutes Panda: Watch the panda cub. Love the panda cub. Worship the panda cub!

A newborn panda cub caught zoo officials by surprise last night, but they say it’s doing well with its mother.

Red panda cub, pictured two weeks ago. (via.) Aw, man. Very sad news to report from the National Zoo today — a three-week-old red panda cub has died. A zookeeper found the cub yesterday during an evening inspection. The Zoo’s press release indicates that the extreme heat was likely not the reason the cub died; rather, red panda cubs just have a shockingly high mortality rate (50 percent!) in captivity. The cub was the…