a linchpin ofa the race is a social construct, the opposition advance most famously by steven jay cool is that humans left africa too recently for significantly at evolution evolution to evolve. if we are talking about evolution through random mutation. in the last 15 years, since the genome was sequenced, it is found that evolution through changes in what is called standing variation. that can be and often has been rapid. such changes had been usually confined to one continent. in proposition seven, i know i'm going through these things but we didn't want to spend 45 minutes presenting the contents of the book. proposition seven katsina populations differences associated with personality abilities and social behavior are common. over the last five years, hundreds of thousands of genetic variants have been identified that are associated with traits such as ability and personality and social behavior. within continental populations, let's say we are comparing chinese and japanese, these differences and trying to avoid the jargon, the difference in the leo frequencies i'll just have to s

joipg me now mat tt bradley and jay steven morrison, director of global health policy center.d to see both of you. so steve, let me start with this now announcement from facebook that they're going to cancel a big software developer conference. it is close to where we're seeing this one case in california. good, presentative or at least cautionary move, do you think? >> it's certainly a sign of the direction that events are moving very, very rapidly right now. in this current situation, as the epidemic globalizes, we're in this period now where we're seeing accelerated spread and explosive outbreaks in places like italy, south korea, iran. but we now have this one case in california. we don't have a vaccine. we don't have antivooirlz or a cure and we are struggling to get effective tests. what are the measures we fall back on, the things that are being -- the decisions that are being taken right now are those that are social distancing. all of these events that involve kongsgations of large numbers of people are being postponed or suspended. business meetings, sports events, g

jay morrissey, and committed unthinkable crimes. >> you're living your life the way you think you're supposed to and evil just walks in and rips rr life apart. >> tom coleman and steven against randy sr. and. >> there are no circumstances you can look at and go maybe this had gone differently. there's nothing the morrisseys could have done that would have prevented this other than never meet the tundadors. >> these two families did intersect with disastrous results, all prosecutors say because a tenant got angry at a landlord. >> who is this little scientist who thinks he's going to mess with me. no one is going to mess with my family and i was going to take care of this. that's what this was. >> in the end randy didn't seem to care about his family. in fact, prosecutors say he tried to pin the blame on his son randy jr. >> the phone calls to detective kendall about test the shirt for dna, that's your killer. and just piling on him, just trying to get himself out of trouble. >> randy jr. won't give him up. >> nope, doesn't give him up. >> randy jr. stuck by his dad even though his father threw him under the bus as soon as he came under suspicion. >> and never stopped