科學(xué)60秒: “身負(fù)重任”的中世紀(jì)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...

北美殖民時(shí)期的婦女

北殖民時(shí)期的婦女Women in Colonial North America The status of women in colonial North America has been well studied and described and can be briefly summarized. Throughout the colonial period t

背誦美文——?jiǎng)游锏牧_盤(pán)

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 ...

青春的自豪

詩(shī)歌The Pride of Youth by Walter Scott Proud Maisie is in the wood, Walking so early; Sweet Robin sits on the bush, Singing so rarely. "tell me ,thou bonny bird, when shall I m...