Unfortunately, we don't have time machines to take us back to the time of the pterosaurs, but we do have paleontologists, scientists who study and interpret fossils. They've been able to use old rocks and bones to discover some pretty amazing things about how these creatures evolved, what...
What do squirrels do in the winter? What do squirrels eat? How many animals have gone extinct during the Holocene? How many pileated gibbons are left in the world? How many endangered species are there in Alaska? How many dingoes are left in the wild? How many western gorillas are left?
The short half-life is only part of the problem when dating dinosaur bones -- researchers also have to find enough of the parent and daughter atoms to measure. Read on to see what it takes to date a fossil and what volcanic ash has to do with it. Dating Sedimentary Rock An eagle fl...
How many vertebrae do we have in humans? Name the five types of vertebrae from neck to buttocks. What parts of the vertebral column are naturally fused? Identify the bones that comprise the vertebral column. How many bones are there in a skull ...
During the past years,many forests have been cut down and the living conditions of the tigers are becoming worse and worse.There are fewer tigers left in the world now. Tigers are the animals of the world,and they should have their own living spaces. ...
SARS teaches people to be thankful.Many doctors and nurses 5 all their time with people who have SARS, and 6 of them have lost their lives.Another student says he wants to be a 7 when he grows up.“Though they know their job is 8 , doctors and nurses are trying their best to 9 ...
To process the oxygen, all snakes have an elongated right lung; many also have a smaller left lung, and a few even have a third lung along the trachea. Two-headed Snakes Two-headed snakes are less like the terrifying multi-headed monsters of myth and more like conjoined twins. Within ...
He worked harder and ran more than any of the others-four to five miles a day ~~perhaps he sensed that the 20___ that seemed to come naturally to so many others did not come naturally to him. Although the entire team runs, only the 21 ___seven runners have the potential to score...
“The First of the Tigers said: ‘He is here under my foot, and his back is broken. Let the Jungle know I have killed Fear.’ “Then Tha laughed, and said: ‘Thou hast killed one of many, but thou thyself shalt tell the Jungle--for thy Night is ended.’ “So the day came; ...
How many 多少数量(可数名词)问数量 Where 在哪里 问地点 When 何时 问时间 Who 谁 问人 Whose 谁的 问主人 (二)注意疑问句的语序 1. 对句子的主语提问,其语序是: 疑问词+谓语+其他成分? She is their teacher. → Is she their teacher? Who is their teacher?