著名教練John Wooden如何定義成功

科學(xué)60秒:滿月:獅子獵食的預(yù)兆

Think humans are at the top of the food chain? Not quite, in parts of Africa. Lions have attacked over 1000 people in Tanzania in the last 20 years. Two thirds of those attacks were ___1___, and ...

科學(xué)60秒: “身負重任”的中世紀盔甲

Medieval armor certainly looks heavy. And now researchers have demonstrated how the protection might have put its wearers at a heavy disadvantage on the battlefield. An armored combatant in the...

郊區(qū)的發(fā)展

郊區(qū)發(fā)展Suburbanization If by "suburb" is meant an urban margin that grows more rapidly than its already developed interior, the process of suburbanization began during the emergence of th...

背誦美文——動物的羅盤

Animals’ CompassesResearchers have found that migrating animals use a variety of inner compasses to help them navigate. Some steer by the position of the Sun. Others navigate by the stars. Some ...