You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
time doesn't matter so much. depends on how strong the selection pressures are. got tuskless elephants in southern africa in a couple of generations.
It matters a lot, especially when other things are also being selected for e.g. there have been noticeable changes in gene frequency related to lighter coloring and lower schizophrenia risk in England/Scandinavia in the 1,000 years.
yes, i know. just saying that selection can happen quickly if the pressures are strong. (note that i’m not saying that i know that that’s what happened in this case.)
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.
