Oldest word and whistling orangutans

University of Reading scientists have discovered that "I , we, who" and the numbers "1, 2" and "3" are amongst the oldest words, not only in English, but across all Indo-European languages. And surprisingly, the ones heading to extinction? "dirty, squeeze, bad, because, guts, push (verb), smell (verb), stab, stick (noun), turn (verb) and wipe"

Bonnie, a 30 year old orangutan, had taught herself to whistle after imitating a caretaker. She has shown her roommate Indah how to whistle too. Scientists say her ability has implications on the evolution of speech. Learn more at the Great Ape Trust.