For this week's tweets we don our scientific spectacles and have a look at some of the more intellectually stimulating happenings on our favourite 140-character messaging platform, many of which come courtesy of the USA.
Hello, Twitter! It's Barack. Really! Six years in, they're finally giving me my own account.— President Obama (@POTUS) May 18, 2015
A great image comparing Mobile Phone sizes over the years. pic.twitter.com/59BHTTv3wt— Leslie Fisher (@lesliefisher) May 13, 2015
25% of US adults say athletic skills are among the most important for children to get ahead in the world today pic.twitter.com/4PbZ1iTD75— Conrad Hackett (@conradhackett) May 1, 2015
Check out last week's tweets of the week!