1.Climate and Life on Earth
2.Penguins in Antarctica
3.Extinction of Big Ice Age Mammals
4.Calculating the Threat of Tsunami
5.Tornado
6.Relationship among Chimpanzees
7.Save Endangered Animals by Cloning
8.Estivators
9.Seahorse Fathers Take Reins in Childbirth
10.Elephants May“Talk”via Vibration
11.Life IS Confusing{or Two-headed Snakes
12.Studying Tree Rings Helps to Understand the History
13.Who Were the Inca?
14.Early Humans' Tolerance of Various Climate Conditions
15.Maya Civilization
16.Qomolangma Melting?
17.Raw Human Waste Killing Off Coral Reefs?
18.Frog Deformities
19.Bright Side of Wildfires
20.Noise P000ution
21.The Production of the Sun's Light and Heat
22.Eclipse
23.Is a Large Asteroid Headed for Impact with Earth in 2880?
24.Inner Earth May Hold More Water than the Seas
25.Are Volcanic Eruptions Tied to Lunar Cycle?
26.Time Travel
27.Sea Water
28.Change in Oceanic Salinity
29.Slaughter——the Most Efficient Way to Control Epidemic
30.What Causes Heart Diseases
31.What Causes Cancer
32.Hydatids——When a Dog Is Not Man's Best Friend
33.Drugs in Sport
34.Road Rage
35.Bacteria
36.Scientists“Drive”Rats by Remote Control
37.Computer Viruses
38.CubicEye
39.Clothes Going Digital
40.The Make of Pottery
41.Natural and Man-made Retroreflection
42.Working Principle of a Refrigerator
43.The Development of Refrigeration
44.An Experiment in Genetic Engineering Modify
45.The Development of the Mathematical Ability in Children
Answer Key
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