Listen for the subtle clicks of the eland bull's knees Behold the ... 5 Record-Breaking Bird Migrations (02:56) 10 Fun Facts About Bioluminescence (02:38) How Cowboys Breed Perfect Cattle (04: ...

IN the antelope house at the New York Zoological Park there are a pair of beautiful animals comparatively little known to the general public. The male eland is the only one in this country ...