Scientists in the US have uploaded a fruit fly to a computer simulation, while an Australian lab has taught neurons on a glass chip to play a 90s video game. How long before we are all living in a sci ...

How many brain cells does it take to play a game of Doom?

Add Yahoo as a preferred source to see more of our stories on Google. Brain-training games sell themselves as a way to maintain cognitive function, but the evidence isn't there yet. Eva-Katalin/E+ via ...

Add Yahoo as a preferred source to see more of our stories on Google. Research shows that crossword puzzles are effective in improving memory. (Getty Images) (artisteer via Getty Images) There is no ...