Tropical plants are migrating to outrun #climatechange. @NatGeo explains, quoting Stanford biologist Greg Asner: http://stanford.io/169FTiA
6:00 PM - 16 Sep 2013
0 replies
9 retweets
4 likes
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.