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Magite Historic/Alamy NOW, I realise my lifelong fascination with how the crops that sustain humanity today were domesticated in the ancient past isn’t shared by everyone. So I was excited to see some classic examples of before and after pictures of familiar fruit and veg popping up on my Twitter feed a few years ago. These showed the sometimes stark differences between the supermarket staples that are familiar today with the wild relatives they were originally derived from. Imagine my surprise when these photographs – normally confined to ethnobotanical textbooks – started to appear on...

The Case of the Serial Sperm Donor One man, hundreds of children and a burning question: Why? Credit...Keith Negley In 2015, Vanessa van Ewijk, a carpenter in the Netherlands, decided that she wanted to have a child. She was 34 and single, and so, like many women, she sought out a sperm donor. She considered conceiving through a fertility clinic, but the cost was prohibitive for her. Instead, she found an ideal candidate through a website called Desire for a Child, one of a growing number of online sperm markets that match candidate donors directly with potential recipients. Ms. van Ewijk was...

>> no, it is. >> how is it already over? >> oh, no. you know better. >> faced with raising a family at such a young age, college would have to wait. the manual labor wasn't tom's first choice to make a living. he had something a little more unconventional in mind. >> the main reason i ended up going into roofing is because i have a felony on my background for production of cannibis. >> and how did you get into that? >> i actually was interested in the biology and the science behind it -- >> of course you were. [ laughter ] >> in the selectively breeding for traits, i picked the best ten plants...

Already, right? >> might be. >> no, it is. >> how is it already over? >> oh, no. you know better. >> faced with raising a family at such a young age, college would have to wait. the manual labor wasn't tom's first choice to make a living. he had something a little more unconventional in mind. >> the main reason i ended up going into roofing is because i have a felony on my background for production of cannibis. >> and how did you get into that? >> i actually was interested in the biology and the science behind it -- >> of course you were. [ laughter ] >> in the selectively breeding for traits,...

Gmo foods. >> we don't want them labeled we want them gone, people are getting sick. john: people are getting very sick? gmo stands for je genetically modified. most corn is. you eat is already, this is a product of years of selective breeding, corn was much smaller than this, and less juicy, but, it means that scientists figured out a way to change food by manipulates individual genes. they have a gene that makes it taste bad to insects. here is an example of a genetic modification that may not be sold in america, these fish are 18-month-old salmon. but the big one was modified to