By James Gallagher
![_71435662_m3750096-family-spl](http://www.brokenlegtheatre.com/wordpress/wp-content/uploads/2013/12/71435662_m3750096-family-spl-300x168.jpg)
Behaviour can be affected by events in previous generations which have been passed on through a form of genetic memory, animal studies suggest.
Experiments showed that a traumatic event could affect the DNA in sperm and alter the brains and behaviour of subsequent generations.
http://www.bbc.co.uk/news/health-25156510