Bright afternoon and early evening light exposure in adolescents leads to lower melatonin levels and delays circadian rhythms ...

Tolerable humidity levels will remain in place on Thursday with high temperatures well into the 80s with a few 90 degree temperatures possible. While there will be plenty of sunshine, afternoon ...

Isa Guha introduces live coverage from day four of Wimbledon, one of the highlights of the sporting summer. Show more ...