but joan rama, for more devices than the kind the researchers hoped to have conclusive results in about 5 years. if our blood is read why i gave you a now over to you, do you have a science question? send it to us as a video, text or voice message. if we answer it on air, we'll send you a little surprise as a thank you. come on. just ask. and don't forget to check out our website. oh, look us up on twitter. and now to this week's question from rodrigo, mankato in ecuador does water drain in opposite directions. in the northern and southern hemispheres. it's certainly the case with tornadoes and hurricanes. the massive air vortices rotate in one direction in the north and the opposite direction in the south. this is due to what's known as the cory. all this force our planet is constantly rotating. everything on its surface is moving to, but at different rates. it's like a ferris wheel sitting in a gondola far away from the central axis. you would move faster than someone sitting at the wheel center. equally, some one of the earth's poles is effectively spinning on the spot. this variatio