Tit bits

1.

Plants ‘see’ underground by channelling light to their roots

https://www.newscientist.com/article/2111027-plants-see-underground-by-channelling-light-to-their-roots/amp

2.

Every year of smoking causes DNA mutations that make cancer more likely -  

http://www.latimes.com/science/sciencenow/la-sci-sn-smoking-cancer-mutations-20161103-story,amp.html

3.