Can't focus? Maybe it's your body clock

Your circadian rhythm could hold the key to staying sharp – here are six ways to understand when your brain works best
Sitting at a desk, reading a textbook may feel like one of the least physical activities you can undertake, but the results of your studying depend on numerous biological factors, including your body clock. Learning and intellectual performance are firmly tied to the body’s internal time.Planet Earth’s rotation – once every 24 hours – is deeply ingr