. >> well, these slackers are endo and sam from slacktivity. and they do various tutorials. but this one again, they are just having a good time under the bridge. >> that's impressive. if you have ever tried to stand on one of those things, you know how difficult it is. the core strength and balance they have -- >> at one point they just start to mirror each other's motions and movements. >> i don't think we have seen them go back and forth like that in such huge swings. >>> what you're looking at is an insurance population of baby long-horned antelopes. you can see they are being cared for by humans and the humans have an interesting collaboration and care for the babies. they are hand raising them at the biosphere in baja, california, surf. in the southern tip of mexico. and the good thing is that once they are full grown, they will send them to zoos in mexico city and los angeles. >> that's perfect. and look at how beautiful they are. >> they look brand through. >> they are very young. and again, these poor antelopes are at the point of being extinct. the interesting thin