american scientist robin reid was hooked the very first time she saw it as a student. she's on the faculty at colorado state university, and has spent decades studying the animals and the maasai people who share the land with the mara migration. >> robin reid: we don't have migrations anymore this large. so this is the only one that stands by itself that is this large. now, if you're talking about butterflies or you're talking about birds, you're talking about, you know, smaller animals, absolutely. you easily get up into these kinds of numbers. but as far as big animals, you know, that are walking long distance, you know, this is the one. >> pelley: this is the last one on earth. >> reid: yep, the last one on earth that is this large. >> pelley: "wildebeest" is dutch for "wild beast," which may refer more to its appearance than any ferocity. it's a relative of the antelope, but it's unlike anything you've ever seen. >> pelley: they call lions regal and elephants majestic. i wonder what you'd call a wildebeest? >> reid: i think they look insane. their horns are kind of

the white house is backing reid, although they have said, robin, a public option is not a must for healthe reform right now. >> you know, there are always strong opinions on both sides of this debate. what are our viewers saying right now on our facebook page. viewers, by the way, if you haven't gone there, we welcome your comments. >> sounding off, lynn says -- then there's mickey, who writes on our facebook page -- all right. thank you both for piping in. keep letting us know what you think. as robin was saying cnn.com/robin. our facebook link is there. >>> more students are expected to stay home from a chicago school after an honor student was beaten to death. parents and leaders are encouraging the boycott, which started yesterday. they want chicago officials to stop the growing violence at christian fenger academy high school. 16-year-old derrion albert was killed during an after-school fight last month. >> they need to get that school under control, and it's not under control at all. >> it's not even a safe haven, nor is it an educational tool for learning. >> three teens have been

robin. more details now on a major turnaround in health care reform efforts. senate majority leader harry reid public option back in with a caveat that states could opt out. correspondent richard lui joins us now. will that help get him the 60 vobill? >> even senator reid admits he's not sure about this. he still has to persuade three moderate democrats to back his plan. ben nelson of nebraska mary landrieu of louisiana and if reid cannot get their votes he may lose other support from other democrats who want to make sure health care reform is passed this year. >> i am for any version that gets us to 60. my goal is to get on the floor and pass it off the floor. that's my goal. and public option may not be part of that. >> now baucus had voted against a public option in the past. >> for argument's sake let's say the version becomes law, what would it mean for the average person watching right now their health care coverage? >> what's in it for me? if you have health insurance through your job, nothing, robin. people with employer-based coverage are actually blocked from switching to this public