The SAS (Special Air Service) make routine use of sleep-deprivation exercises in their selection process, and these often feature in later training. Hallucinations during such exercises are very commo

Somewhere in the amazonian understorey, beneath a great forest canopy, a cricket leaps on to the stem of a shrub. It’s the last leap it will ever make. It never gets to flex its legs again. It’s stuck

Mike Palmer explains how despite its quiet, slumbering appearance, there’s lots happening in our outside spaces during the colder, darker months

Whether winter-faded ferns, the spindly harvestman or the tyrannical stare of an irate chicken, through-lines from the prehistoric to our modern age are all around us in November, says John Lewis-Stempel

Dr Daniel Allen puts the spotlight on Britain’s only native crayfish

I t’s 2am and Grandpa Boofhead is feeling frisky, his bellows echoing through the moonlit eucalyptus trees around my house in the Adelaide Hills, South Australia. It’s early spring, the breeding seaso