Sleep is modulated by the circadian rhythm, which develops according to the levels and timing of light exposure. Various social, individual, and environmental factors can also influence sleep.

In the parable of the blind men and the elephant, several blind men each describe a different part of an elephant they are touching – a sharp tusk, a flexible trunk, or a broad leg – and disagree ...

A new study published in the Journal of Biogeography provides some of the first evidence that ecological patterns at large spatial scales have been significantly altered within recent human history ...