Why buffaloes and crickets help us relax

Richard Vine: Prince William has admitted that the sounds of African animals help him chill out. But not all creatures have the same effect on everyone. So what would your choice be?

The 20 online talks that could change your life

Tom Meltzer: From TED talks to online seminars, video channels crammed with inspirational and thought-provoking lectures are educating us on everything from town planning and depression to body language, animal morality and dangers of sugar in just a few minutes. Here is our pick of the best