but watch when they get it robot up on a horizontal bar. in the olympics they have the uneven bars and parallel bars and i don't know what event this would be. to get him on the bar, he starts rocking. watch his legs. starts pumping, eventually able to spin around, spin around, spin around, watch this. flips off the bar and catches the bar again. but that's not the most impressive part. watch the landing. triple back flip and lands it. sticks the landing. watch it again in slow motion. even that little hop back that the gymnasts do after they hit the mat. one ankle up in the air. perfect landing. you would say a perfect 10, too, from the judges. >> if you're thinking like you're this smart, if you can make a robot do stuff, it's funny this is what you'd choose to make it do. >> i'm not threatened by a robot that can do an awesome performance on the parallel bars. >> a diver shares an incredible moment with a hump back whale. >> then it got a little toot close for comfort. >> now their latest song and musical video about the magical place the

bars and stream deltas. geologists refer to this as cross-bedding because it cuts across the direction of ordinary horizontal bedding. sets of cross-beds often develop. for example, at any gigiven point in a stream, periods of deposition may alternate with periods of erosion as the velocity of the wind or water changes. a set of cross-beds in a bar will be truncated by erosion... then covered by another set of cross-beds when deposition resumes. cross-bedding is a sedimentary structure that is very revealing. if we look at a set of cross-beds that are very steep, that are truncated by the next set of cross-beds, then we know that we had a river system or a depositional system that was constantly interrupting itself and shifting around. if we have a smooth progradation of cross-beds, we know there's no interruption and it's just a steady stream of deposition in more or less a constant fashion. geologists find cross-beds useful in determining the direction of sediment transport in ancient river and dune systems. cross-beds form perpendicular to the direction of the water current and tend to slope downstream. i