Instead of one species of elephant, Africa has two, researchers said on Tuesday, confirming suspicions about the two distinctly different looking pachyderms.
Using gene sequencing tools, teams from Harvard, the University of Illinois and the University of York in Britain have shown that instead of being the same species — as

Marathon runners can train for months to condition for the big race, yet struggle to finish if they exhaust stores of carbohydrates too quickly, a phenomenon known as “hitting the wall”.