By Jenny Graves, La Trobe University

The Y chromosome, that little chain of genes that determines the sex of humans, is not as tough as you might think. In fact, if we look at the Y chromosome over the course of our evolution we’ve seen it shrink at an alarming rate.

Hang on? Oh, there you are… ESA, Author provided

By Monica Grady, The Open University

Phew, what a day it was yesterday. Ended up having a quiet drink at the hotel. Last drink of the day – a nice cup of tea!

It’s a known fact that exercise is addictive. But CrossFitters – those who take part in CrossFit’s brutal workouts and stringent diet – are infamous for their fanatical devotion to their fitness philosophy. They can be found doing pull-ups and heavily weighted squats, flipping tires or hitting them with a sledgehammer, climbing ropes, tossing medicine balls, and “going Paleo<.”

By Sabu S Padmadas, University of Southampton

By Bob Pressey, James Cook University and Euan Ritchie, Deakin University

By Alex Jordan, University of Texas at Austin