Why do I get a stitch when I exercise? - Ask the Naked Scientists 15.02.27

Published: Feb. 27, 2015, 12:03 p.m.

b'Why do I get a stitch when I exercise? What determines our body temperature? How quickly do fruit and vegetables lose nutrients after they are picked? Why do ropes get tangled up in knots? Can you get stuck together during sex? Plus, news of an edible gene therapy to control insect pests...'