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Do you like fossils?Do you like snails?Then you will like this.In this article read about how you know if it was a water animal or land animals.Hope you like it

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Turritella Agate: The gem rough with fossil snails!

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Turritella Agate is a brown translucent agate from the Green River Formation of Wyoming that is loaded with fossil snails. It should have been named Elimia Agate.

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Do you like dinosaurs?I do.Read about dinosaurs and kind of what hapend when the meteor hit the earth and went...BOOM!

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Most people think of dinosaurs as big, ferocious and extinct reptiles. That's largely true, but there are some misconceptions. Dinosaurs came in all shapes and sizes. Dinosaurs were the largest land animals of all time, but a great number of dinosaurs were smaller than a turkey.

Dinosaurs first appeared between 247 and 240 million years ago. They ruled the Earth for about 175 million years until an extinction event 65.5 million years ago wiped out all of them, expect for the avian dinosaurs. Scientists don't agree entirely on what happened, but the extinction likely was a double or triple whammy involving an asteroid impact, choking chemicals from erupting volcanoes, climate change and possibly other factors.

Only the big, classic dinosaurs are extinct. Birds are living dinosaurs, most experts believe. Think of that next time a pigeon strafes you.

Fossils show that some of the more advanced dinosaurs had feathers or feather-like body covering, but many of them didn't fly and probably didn't even glide. Archaeopteryx, which was for a long time considered to be the first bird (although this status is not certain), could likely launch itself from the ground, but probably couldn't fly far, according to unpublished research presented at the 2016 Society of Vertebrate Paleontology meeting in Salt Lake City, Utah. Instead, feathers, likely helped these bird-like dinosaurs stay warm as juveniles or send signals to other individuals.

Many people think extinct flying reptiles called pterosaurs were dinosaurs. They were dinosaurs' closest relatives, but technically not dinosaurs. Pterosaurs had hollow bones, relatively large brains and eyes, and, of course, the flaps of skin extending along their arms, which were attached to the digits on their front hands. The family includes Pterodactyls, with elaborate, bony head crests and lack of teeth. Pterosaurs survived up until the mass die-off 65 million years ago, when they were went the way of the dodo along with marine reptiles and other nonavian dinosaurs.

Dinosaur fossils were first recognized in the 19th century. In 1842, paleontologist Richard Owen coined the term dinosaur, derived from the Greek deinos, meaning "terrible" or "fearfully great," and sauros, meaning "lizard" or reptile." Scientists classify dinosaurs into two orders - Saurischians and Ornithischians- based on the structure of the bones in their hips. (This saurischian and ornithischian grouping is now disputed. See the "Family tree update" section below to learn more.)

Most of the well-known dinosaurs - including Tyrannosaurus rex, Deinonychus and Velociraptor - fall into the order known as Saurischian dinosaurs (pronounced sor-ISK-ee-en). These "reptile-hipped" dinosaurs have a pelvis that points forward, similar to more primitive animals. They are often long-necked, have large and sharp teeth, long second fingers, and a first finger that points strongly away from the rest of the fingers.

Saurischians are divided into two groups - four legged herbivores called sauropods and two-legged carnivores called theropods (living birds are in the theropod lineage).

Theropods walked on two legs and were carnivorous. "Theropod" means "beast-footed" and they are some of the fearsome and most recognizable dinosaurs - including Allosaurus and .

Scientists have wondered whether large theropods - such as Giganotosaurus and Spinosaurus - actively hunted their prey, or simply scavenged carcasses. The evidence points to the animals working together as opportunistic hunters: they would bring down prey, but also eat animals that were lying around. When fossil-hunters found bones with bite marks on them, they wondered if theropods engaged in cannibalism. It appears now that the animals may have scavenged their own kind, but they didn't hunt down their own.

Sauropods were herbivores with long heads, long necks and long tails. They were among the largest land animals ever, but they likely had small brains. The gentle giants like leaf-eating Apatosaurus, Brachiosaurus and Diplodocus are part of this family.

Ornithischian (pronounced or-neh-THISK-ee-en) dinosaurs, a group that includes horned and frilled Triceratops, spiked Stegosaurus and armored Ankylosaurus, are more mild-mannered, plant eaters.

These dinosaurs were beaked herbivores. Smaller than the sauropods, the ornithischia (meaning "bird-hipped") often lived in herds and were prey to the larger species of dinosaurs. Interestingly, the ornithischia shifted from a two-legged to a four-legged posture at least three times in their evolutionary history and scientists think they could adopt both postures early in their evolutionary history.

In 2017, a metaphorical bombshell hit the paleontology world regarding the dinosaur family tree. A study published in the journal Nature suggested that this hip-oriented classification was incorrect. Rather, theropods are likely close cousins with the ornithischian dinosaurs, and the two groups - the theropods and Ornithischia - form a newly identified group known as Ornithoscelida, the researchers said.

The old (left) and the new (right) dinosaur family tree.

Credit: University of Cambridge

The finding came about after researchers realized that theropods and Ornithischia had many anatomical features in common. If the updated tree is correct, it may explain why both theropods and Ornithischia have feathers, while other dinosaurs don't.

However, this hypothesis will need to be tested and retested over the next several years before the paleontology community can fully accept it.

During the age of the dinosaurs, a lot was happening below the surface of the world's oceans. The "fish flippers," or ichthyopterygia, includes Ichthyosaurus - the streamlined, tuna- and dolphin-shaped ocean-going predators. This abundant family of marine reptiles largely went extinct at the end of the Jurassic Period.

Despite the popularity of the "Jurassic Park" franchise, it would be incredibly difficult, if not impossible, to clone a dinosaur. In order to clone a dinosaur, researchers would need dinosaur DNA. But there is no known surviving dinosaur DNA on record (the oldest recovered and authenticated DNA sample belongs to a 700,000-year-old horse that lived in ancient Canada.)

However, some dinosaur organic matter has withstood the test of time. Researchers have uncovered a number of soft tissues from the Mesozoic era, including 80-million-year-old blood vessel belonging to a duck-billed dinosaur and 130-million-year-old proteins in an early bird fossil. But blood vessels and proteins, unlike DNA, cannot be used to clone animals.

There is a concerted effort to reverse engineer a chicken into a dinosaur (remember, birds are the descendants of theropod dinosaurs), but the team still has a ways to go.

Additional reporting by staff writer Laura Geggel.

More on dinosaurs

Time periods

Precambrian: Facts About the Beginning of Time

Paleozoic Era: Facts & Information

Mesozoic Era: Age of the Dinosaurs

Cenozoic Era: Facts About Climate, Animals & Plants

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Most people think of dinosaurs as big, ferocious and extinct reptiles. That's largely true, but there are some misconceptions. Dinosaurs came in all shapes and sizes. Dinosaurs were the largest land animals of all time, but a great number of dinosaurs were smaller than a turkey.

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Do you wander about how rocks are formed?What diffrent rocks there are?In this artical learn about how volcanic rocks are formed and where they are mostly found.In my opinion I thought it was really good.

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Rocks are so common that most of us take them for granted-cursing when we hit them with the garden hoe or taking advantage of them to drive in tent pegs on summer camping trips.

What Is a Rock?

To geologists, a rock is a natural substance composed of solid crystals of different minerals that have been fused together into a solid lump.

The minerals may or may not have been formed at the same time. What matters is that natural processes glued them all together.

Types of Rocks

There are three basic types of rock: igneous, sedimentary, and metamorphic.

Extremely common in the Earth's crust, igneous rocks are volcanic and form from molten material. They include not only lava spewed from volcanoes, but also rocks like granite, which are formed by magma that solidifies far underground.

Typically, granite makes up large parts of all the continents. The seafloor is formed of a dark lava called basalt, the most common volcanic rock. Basalt is also found in volcanic lava flows, such as those in Hawaii, Iceland, and large parts of the U.S. Northwest.

Granite rocks can be very old. Some granite, in Australia, is believed to be more than four billion years old, although when rocks get that old, they've been altered enough by geological forces that it's hard to classify them.

Sedimentary rocks are formed from eroded fragments of other rocks or even from the remains of plants or animals. The fragments accumulate in low-lying areas-lakes, oceans, and deserts-and then are compressed back into rock by the weight of overlying materials. Sandstone is formed from sand, mudstone from mud, and limestone from seashells, diatoms, or bonelike minerals precipitating out of calcium-rich water.

Fossils are most frequently found in sedimentary rock, which comes in layers, called strata.

Metamorphic rocks are sedimentary or igneous rocks that have been transformed by pressure, heat, or the intrusion of fluids. The heat may come from nearby magma or hot water intruding via hot springs. It can also come from subduction, when tectonic forces draw rocks deep beneath the Earth's surface.

Marble is metamorphosed limestone, quartzite is metamorphosed sandstone, and gneiss, another common metamorphic rock, sometimes begins as granite.

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Rocks are so common that most of us take them for granted-cursing when we hit them with the garden hoe or taking advantage of them to drive in tent pegs on summer camping trips. What Is a Rock? To geologists, a rock is a natural substance composed of solid crystals of different minerals that have been fused together into a solid lump.

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1.Find out how many fossils and rocks there are all together.          2.Find out how many dinosaurs survide the meteorite.                    3.                                    4.                                    5.

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1.How many diffrent rocks and fossils are there together?                                      2.What kind of dinosaurs survide the meteorite?              3.                                                4.                                                  5.

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Do you wounder how people find fossils?What kind of tools you need to find them?In this video see how people trace fossils and how they are formed.

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Do you like songs?Do you like fossils and rocks?I do so I chose the Fossil rock anthem because because it is a song about fossils and rocks.

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Party Rock Anthem - fossilized! This video is part of my thesis from the Master of Science Communication program at the University of Otago. I now teach 8th grade science at the Nueva School near San Francisco, and I've launched a new YouTube show called Science With Tom with weekly videos.

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Have you ever wounder about how fossils are formed?In this video see how fossils are formed.

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Dinosaurs Cartoons For Kids To Learn & Enjoy

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How are fossils formed Kids learning Animation Video Tutorial

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Смех, юмор. Подписывайтесь на наш канал!

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Have you ever wanted to see a rock with markings?If so today is your lucky day you get to see a photo of one.YEH!

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Do you like dinosaurs? I do my favorite dinosaur is the t-rex.In this photo you can see a t-rex.

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Do you ever wounder about fossils?See a fish fossil in this photo