babies develop a personality the mouth is their gateway to the world. wide and even paid to. do you have a science question that you've always wanted answered it we're happy to help out and send it to us as a video text over as well if we answer it on the show we'll send you a little surprise as a thank you can i just ask you. to find as i did of you dot com slash science or drop us a line at d w underscore site tech on facebook d w dot science. now we head back to the water in switzerland where artists are making a comeback the dextrous animals have many clever habits for example they sleep holding hands so they don't drift away in the river. just scientists have been