Screen time only mildly linked to behavioral problems, but may have social benefits

Limiting screen time for young adults after concussion results in shorter duration of symptoms

Good sleep-time recovery is associated with a healthier diet and lower alcohol consumption

About 506 million years ago, a strange marine creature whose body so resembled a science-fiction spacecraft that it has been dubbed 'the mothership' thrived in tropical seas, menacing prey on the ocean floor in what is now Canada as one of Earth's largest predators to that point in time.