How to Sleep Like a CavemanSleep has hardly changed since Paleolithic humans snoozed soundly in their caves. While sabre toothed tigers were their biggest night time worry, today its stress and social media that keep us awake, but the solutions are the same. Sleep therapist Dr Merijn van de Laar offers understanding and advice to have you sleeping better within weeks. Human sleep as we know it today evolved hundreds of thousands of years ago to suit a hunter gatherer lifestyle.