When did we evolve the ability to whistle? #Fb
Replying to @drethelin
It seems like a side effect of round articulation so likely co-extant with language
2:42 PM - 5 Jan 2018
0 replies
0 retweets
1 like
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.