在经历了一系列致命的心脏问题后,他总是会设定一个又一个的目标来激励自己康复。在他看来,没有运动和马拉松,生命也就意味着终止。Randy Lazer started running back in 1990 as a way to step into a healthier lifestyle.As an asthm...在经历了一系列致命的心脏问题后,他总是会设定一个又一个的目标来激励自己康复。在他看来,没有运动和马拉松,生命也就意味着终止。Randy Lazer started running back in 1990 as a way to step into a healthier lifestyle.As an asthma sufferer who didn't work out much,he took it one step at a time,going out for a half-mile jog his first time on the road.It took about four tries for him to make it a full mile,but that only motivated him to go farther.展开更多
Tim Caro, Professor of Wildlife Biology at the University of California, Davis, has made it his duty to understand the evolution of color in mammals. The researcher spent twenty years investigating why zebras have bla...Tim Caro, Professor of Wildlife Biology at the University of California, Davis, has made it his duty to understand the evolution of color in mammals. The researcher spent twenty years investigating why zebras have black and white stripes and even wrote a book, Zebra Stripes, about his very great discovery. Now, Caro has solved the age-old mystery of why giant pandas also have the double color. According to the researcher, understanding why the giant panda has such striking coloration has been a long-standing problem in biology that has been difficult to solve because virtually no other mammal has this appearance, making comparisons difficult.展开更多
Have you ever found yourself in this situation: You hear a song you used to sing when you were a child-a bit of nostalgia or “blast from the past” as we say. But it is not a distant childhood memory. The words come ...Have you ever found yourself in this situation: You hear a song you used to sing when you were a child-a bit of nostalgia or “blast from the past” as we say. But it is not a distant childhood memory. The words come back to you as clearly as when you sang them all those years ago.展开更多
文摘在经历了一系列致命的心脏问题后,他总是会设定一个又一个的目标来激励自己康复。在他看来,没有运动和马拉松,生命也就意味着终止。Randy Lazer started running back in 1990 as a way to step into a healthier lifestyle.As an asthma sufferer who didn't work out much,he took it one step at a time,going out for a half-mile jog his first time on the road.It took about four tries for him to make it a full mile,but that only motivated him to go farther.
文摘Tim Caro, Professor of Wildlife Biology at the University of California, Davis, has made it his duty to understand the evolution of color in mammals. The researcher spent twenty years investigating why zebras have black and white stripes and even wrote a book, Zebra Stripes, about his very great discovery. Now, Caro has solved the age-old mystery of why giant pandas also have the double color. According to the researcher, understanding why the giant panda has such striking coloration has been a long-standing problem in biology that has been difficult to solve because virtually no other mammal has this appearance, making comparisons difficult.
文摘Have you ever found yourself in this situation: You hear a song you used to sing when you were a child-a bit of nostalgia or “blast from the past” as we say. But it is not a distant childhood memory. The words come back to you as clearly as when you sang them all those years ago.
