.The beaver is the earliest swimming mammal ever found. It's also the most ancient mammal to be preserved... mammals.A Chinese research team found that 164 million years ago the mammal had a tail like a beaver ……

organisms.”Attenborough’s other unusual “passengers” include: the solenodon, an ancient mammal; marvelous ……

The blue whale is the world’s largest mammal (哺乳动物). Its tongue is as heavy as a female (雌性) elephant. ……

A FOSSILIZED mammal discovered in China is possibly the great-grandmother of modern placental (有胎... years, has been identified as the world's earliest-known eutherian (真哺乳亚纲的) mammal fossil. ……

河鳄鱼).Africa is also rich in culture. It has the oldest human history on earth. For example, ancient... living land mammal (哺乳动物). It has no natural enemies for there are none large enough to challenge it. ……

journal.Once the age of the dinosaurs ended, mammal sizes quickly grew, then leveled off (呈平... upper limit on body size.“What we see is mammal sizes leveling out across all lineages (种系 ……

’s Science journal.Once the age of the dinosaurs ended, mammal sizes quickly grew, then leveled off (呈平... of the Earth set an upper limit (上限) on body size.“What we see is mammal sizes leveling off across all ……

of mammal. Active volcanoes showered the territory with ash, and lava flows blocked rivers to form lakes... Haile-Selassie was set to work in 1995 as a graduate student, searching the ancient sediments ……

of dolphins and lions," said Tom Lapuzza, spokesman for the US Navy's Marine Mammal Programme.Sea... wars.Dogs were first used for war purposes by the ancient Greeks. During their conquest of Latin ……

are the world’s only mammal that’s covered in scales (鳞片) from head to toe.  ..., Southeast Asia and parts of Africa. Pangolins are the world’s only mammal that&rsquo ……

mammal found in Asia and Africa. The creature has a cat-like body, long tail and weasel-like face ……

is the only flying mammal (哺乳动物)?A. A bee.B. An eagle (鹰).C. A bat.4. Why do penguins always waddle (摇摇 ……

illusion?Ancient Greek philosopher Plato argued that time is constant - and life's an illusion. Albert...: 磁场mammal: 哺乳动物sulphur: 硫磺 ……

. The results shocked scientists. If regeneration is possible in this mammal, it might also be possible ……

. ---------------------------------------dinosaur: 恐龙extinction: 灭绝fossilize: 使成化石mammal: 哺乳动物milkshake: 奶昔tyrannosaur: 霸王龙 ……