While many animals walk on the balls of their feet, humans use a heel-first stride. Researchers suggest that this gives humans the advantage of longer 'virtual limbs.'
"While these compelling results come too late for those who lost their lives during West Africa's Ebola epidemic, they show that when the next Ebola outbreak hits, we will not be defenceless."
Sunlight, through a mechanism separate than vitamin D production, energizes T cells that play a central role in human immunity, researchers have found.