Baby sea turtles （海龜） are born on land， then they have to get to the ocean—fast！ They are born at night when it is dark outside， so how do they find the water？ The ocean has some natural light， and turtles follow that light. But lights from houses near the beach can make the turtles go towards the wrong direction. They may crawl1 around for a long time before they find the ocean.

Scientists wanted to know if all the crawling made the turtles tired. They watched baby turtles walk on small treadmills （跑步機(jī)）， and then they put the turtles in water. The extra2 crawling did not make them too tired to swim！ But more time on the beach means the baby turtles might be eaten by animals waiting for a quick meal. People can help sea turtles by turning off the lights near beaches at night.

在海灘上孵化的小海龜們，必須要盡快爬向大海！而夜晚漆黑一片，它們?cè)撊绾握业交丶业穆?？小海龜?huì)向著大海的自然光源走。但附近的人造光源會(huì)令它們迷失方向，更長(zhǎng)時(shí)間地在海灘游蕩。

科學(xué)家們想知道，迷路會(huì)對(duì)小海龜造成多大影響。在海灘上長(zhǎng)時(shí)間爬行，它們會(huì)不會(huì)疲勞？于是，他們把海龜放在跑步機(jī)上，并測(cè)試它們?cè)谂佬泻蠡貧w大海的游泳能力。結(jié)果證明，小海龜并沒(méi)有那么疲勞！但它們?cè)诤┥蠝舻臅r(shí)間越長(zhǎng)，越容易被其他動(dòng)物吃掉。所以，人們還是應(yīng)該通過(guò)關(guān)閉人造光源，來(lái)幫助海龜們盡早歸家。