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Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between and million years ago,​.
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• Discovery reveals dinosaurs were breeding near the South Pole.
• Dinosaur Facts
• Did bees live in the time of dinosaurs?

Subscribe for fascinating stories connecting the past to the present. The Cretaceous-Tertiary extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took place some For many years, paleontologists believed this event was caused by climate and geological changes that Neanderthals are an extinct species of hominids that were the closest relatives to modern human beings.

They lived throughout Europe and parts of Asia from about , until about 40, years ago, and they were adept at hunting large, Ice Age animals.

Denisovans are an extinct species of hominid and a close relative to modern humans. Denisovans may have ranged from Siberia to Southeast Asia during Hunter-gatherers were prehistoric nomadic groups that harnessed the use of fire, developed intricate knowledge of plant life and refined technology for hunting and domestic purposes as they spread from Africa to Asia, Europe and beyond. From African hominins of 2 million years An ice age is a period of colder global temperatures and recurring glacial expansion capable of lasting hundreds of millions of years.

Thanks to the efforts of geologist Louis Agassiz and mathematician Milutin Milankovitch, scientists have determined that variations in the The Stone Age marks a period of prehistory in which humans used primitive stone tools. Lasting roughly 2. During the Stone The Neolithic Revolution, also called the Agricultural Revolution, marked the transition in human history from small, nomadic bands of hunter-gatherers to larger, agricultural settlements and early civilization.

Discovery reveals dinosaurs were breeding near the South Pole.

The Neolithic Revolution started around 10, B. The Iron Age was a period in human history that started between B. During the Iron Age, people across much of Europe, Asia and parts of Africa began making tools and weapons from iron and The Fertile Crescent is the boomerang-shaped region of the Middle East that was home to some of the earliest human civilizations.

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This Day In History. Unearthing Dinosaurs.

Why Did the Dinosaurs Die Out? Neanderthals Neanderthals are an extinct species of hominids that were the closest relatives to modern human beings.

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• How the earliest mammals thrived alongside dinosaurs;
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Denisovans Denisovans are an extinct species of hominid and a close relative to modern humans. How do we know that bees were around when dinosaurs still roamed the Earth? The main evidence comes from fossils — the mineralized remains of long-dead organisms. A lot has to go right for a dead creature to become a fossil.

It has to be quickly covered by sediment before a scavenger has a chance to eat it — and the sediment has to be just right to preserve the details of its body. Then, millions of years later, that same sediment, now rock, has to become exposed through erosion so that people can find it and study it. When things go right, even a single fossil specimen can reveal a great deal.

Extinct animal species, known only from fossils, often look very different from creatures alive today. But scientists can almost always identify which branch of the tree of life they belong to, and thereby identify how they are related. The dinosaurs — T. The same is true for insects. Scientists can identify something as a bee by its distinctive features, such as the structure of its antennae, the shapes of its major body parts, and the pattern of veins in its wings.

Using these features, scientists have identified fossils of dozens of species of extinct bees.

Some look like modern bees; others look quite different but are still recognizable as bees. The oldest fossil bees look a lot like wasps. In fact, bees are thought to be a branch of the wasp family tree that evolved a vegetarian lifestyle , getting food from flowers instead of eating other insects. The most exquisitely preserved fossil bees have been found in amber, which is fossilized plant sap. Perhaps these bees became trapped in sap while trying to collect it for constructing their nests — something many bees do today.