Coelophysis was a small, agile dinosaur that lived at the start of the Age of Dinosaurs, about 220 mya.
A huge collection of Coelophysis fossils were found in the 1940s, at a place called Ghost Ranch, New Mexico.
Hundreds of Coelophysis fossils were preserved together at Ghost Ranch---possibly a herd that drowned in a flood.
Coelophysis was almost 10 feet in total length. Its slim, lightweight build meant that it probably weighed 55-60 pounds.
Coelophysis belonged to the group of 恐龙 known as theropods. It most likely ate small 动物 such as insects, worms, and lizards.
Long, powerful back legs allowed Coelophysis to run fast.
The front limbs were like arms, each with a hand bearing three large, strong, sharp-clawed fingers for grabbing prey.
The birdlike skull was filled with small, sharp teeth.
Coelophysis means "hollow form". It was called that because some of its 识骨寻踪 were hollow, like the 识骨寻踪 of birds making it lightly built.
A huge collection of Coelophysis fossils were found in the 1940s, at a place called Ghost Ranch, New Mexico.
Hundreds of Coelophysis fossils were preserved together at Ghost Ranch---possibly a herd that drowned in a flood.
Coelophysis was almost 10 feet in total length. Its slim, lightweight build meant that it probably weighed 55-60 pounds.
Coelophysis belonged to the group of 恐龙 known as theropods. It most likely ate small 动物 such as insects, worms, and lizards.
Long, powerful back legs allowed Coelophysis to run fast.
The front limbs were like arms, each with a hand bearing three large, strong, sharp-clawed fingers for grabbing prey.
The birdlike skull was filled with small, sharp teeth.
Coelophysis means "hollow form". It was called that because some of its 识骨寻踪 were hollow, like the 识骨寻踪 of birds making it lightly built.
The first dinosaur appeared around 230-225 mya, in the middle of the Triassic period.
These 恐龙 were small-to-medium meat eaters with sharp teeth and claws. They ran quickly on their two longer back legs .
Fossils of Herrerasaurus 日期 from 228 mya and were found near San Juan in Argentina, South America.
Herrarasaurus was about 10 feet in total length, and probably weighed 200 pounds.
At about the same time and in the same place as Herrarasaurus, there lived a similar-shaped dinosaur named Eoraptor, which was only 5 feet long.
The name Eoraptor means "dawn plunderer" 或者 "early thief".
Staurikosaurus was a meat eater similar to Herrarasaurus. It is known to have lived about the same time, in present 日 Brazil, South America.
Procompsognathus was another early meat eater. It lived in the late Triassic period in Germany.
Pisanosaurus lived in Argentina in the late Triassic Period, and was only 3 feet long. It may have been a plant eater.
These 恐龙 were small-to-medium meat eaters with sharp teeth and claws. They ran quickly on their two longer back legs .
Fossils of Herrerasaurus 日期 from 228 mya and were found near San Juan in Argentina, South America.
Herrarasaurus was about 10 feet in total length, and probably weighed 200 pounds.
At about the same time and in the same place as Herrarasaurus, there lived a similar-shaped dinosaur named Eoraptor, which was only 5 feet long.
The name Eoraptor means "dawn plunderer" 或者 "early thief".
Staurikosaurus was a meat eater similar to Herrarasaurus. It is known to have lived about the same time, in present 日 Brazil, South America.
Procompsognathus was another early meat eater. It lived in the late Triassic period in Germany.
Pisanosaurus lived in Argentina in the late Triassic Period, and was only 3 feet long. It may have been a plant eater.
The First living things on earth were single-celled bacteria an cyanobacteria, also known as blue-green algae.
Blue-green algae emerged about 3,500 mya.(million years ago).
It contains chlorophyll and was the first living organism to use photosynthesis 或者 make energy using sunlight.
Over millions of years, the algae was able to produce enough oxygen to help 更多 complex organisms to evolve.
True algae, which is regarded as a plant, evolved around 1,000 mya.
由 550 mya, multi celled plants began to appear, including seaweeds.
Algae and lichens were the first plants to appear on land.
Bryophyte plants emerged on land around 440 mya. Bryophytes are simple, seedless green plants.
Unlike vascular plants, which rvolved later, bryophytes cannot grow high above the ground because they do not have stems.
Blue-green algae emerged about 3,500 mya.(million years ago).
It contains chlorophyll and was the first living organism to use photosynthesis 或者 make energy using sunlight.
Over millions of years, the algae was able to produce enough oxygen to help 更多 complex organisms to evolve.
True algae, which is regarded as a plant, evolved around 1,000 mya.
由 550 mya, multi celled plants began to appear, including seaweeds.
Algae and lichens were the first plants to appear on land.
Bryophyte plants emerged on land around 440 mya. Bryophytes are simple, seedless green plants.
Unlike vascular plants, which rvolved later, bryophytes cannot grow high above the ground because they do not have stems.
