New research on our internal trade-off when physical and mental performance are put in direct competition has found that cognition takes less of a hit, suggesting more energy is diverted to the brain than body muscle. Researchers say the findings support the 'selfish brain' theory of human evolution.
They're not shy about showing off the goods on social media!
Bella Hadid and Kendall Jenner both posted sexy selfies on Instagram yesterday, and while they looked hot, people are...
