dr. craig venter:pioneers like casey help us. because we'll find out-- from all the tests- - whether she develops something early on or whether she never develops it. scientists are trying to figure out how she can live with the same genetic mutation that took her brother's life. nats casey blood draw, "i'm used to it"they're also monitoring for the signs of the disease. so far? everything looks goodno signs of cancer.nats casey and marlo high five in exam roomwhich means she's free to be a normal teenager - applying for college, studying, and dancing competitively...nats casey dancingi have the strength, and it's because of my brother and seeing him go through this with a smile on his face, and so much strength. add he lived every day to his fullest. casey has started a project called genome generation to honor her brother's memory.and encourage others to consider genetic testing.she says her brother's death saved her life. casey: he taught me so much even before he was sick. and he's the reason i am who i am today.nats kiss "i

this is an area of specialization for dr. craig downs, and what he is learning is troubling. >> for example, imidacloprid can affect crab larvae as low as 50 parts per quadrillion. it affects their mitochondria at this level, so that it's a mitochondrial poison. it can affect their muscles. if the mitochondria are damaged in the muscles, it can cause paralysis. it also causes immune suppression in these crabs. meaning that they are much more susceptible to bacterial infections and fungal infections when co-exposed with imidacloprid. >> craig downs also studies the impact of imidacloprid on sea urchins. >> neonicotinoids cause dna damage in sea urchin sperm as low as 500 parts per trillion. it causes developmental abnormalities as low as 5 parts per trillion. it means that they're a mutagen. um, it means there's a direct threat to the reproductive fitness of the entire biodiversity of marine environments. if you have damage to sperm or if you have damage to eggs, the next generation will not be as fit or might not come into existenc

here with more about the value of the mammogram is dr. craig schulz. great to see you. >> thank you so much. >> an important month for us to talk about surprising that one in eight will get breast cancer at some point. that's a lot. you know if you're with a small group of friends you can count on the fact one of you will be touched by it. >> it is a very common disease. this year alone, there will be about 250,000 women diagnosed with invasive breast cancer. another 60,000 with preinnovative breast cancer. it is a big problem. about 40,000 women will die of their breast c so it's a lot of women, but, thankfully over the years, since about 1990, the number of women dying of breast cancer continues to go down on a annual basis and most importantly, women in their 40s and 50s who typically have a very invasive aggressive breast cancer typically are living longer and being cured of their disease. so all good news. >> uh-huh. >> and the reasons they are living longer is because we're finding it earlier right? technology. obviously self-breast exams at home

kenneth craig, cbs news, new >>> a dr. phil exclusive today as he speaks with a woman now engaged to stephen avery. the subject of netflix and the making of a murderer. today dr. phil explains how this relationship developed. >> you light up when you talk about him. this relationship is obviously built. how long did it take this relationship to turn romantic? you had a reaction when you got the letter, but was this immediately in love at first right -- write? >> why she believes he's it is today at 4:00 on dr. phil. tonight a possible breakthrough in the fight against hiv. could be the first to be cured. how that could pave the way to treating millions around the world with hiv. ashton is back now. >>> we are in the 60s and even the 70s in some areas. we will top out at 81 today and then a bigger drop tomorrow and i first met mike on a fundraising event to help the hunger in ethiopia. i was an aurora scholar this year. at his birthday party. mike is a very nice guy. he's a really nice guy. he can do 62 pushups. mike is a g