What is the largest fossil found in the world so far, and how big is it?

The megalodon lived 200,000 years ago and was the size of two buses.

The world's largest dinosaur fossil refers to the brontosaurus fossil found in Argentina.

José Luis Calvallido was one of the scientists involved in the excavation of the world's largest dinosaur fossil. The dinosaur's "skeleton size is larger than any large animal known in the past, and is probably the largest creature ever to walk on Earth," he said. "According to speculation and calculation, it is 40 meters long, 20 meters tall when standing with its neck straight, which is equivalent to seven floors, and a single femur is a meter long.

Interestingly, previously found dinosaur fossils were often fragments, but this time an almost complete skeleton was found. Since the femur and humerus of a dinosaur are directly related to its weight and size, it is also possible to estimate the weight of a large dinosaur with some accuracy for the first time. The figures were also very impressive, this dinosaur weighed almost 80,000 kilograms, which is equivalent to 14 African elephants, so this is definitely the largest dinosaur fossil ever found.

The largest dinosaur fossil in China

The largest complete dinosaur fossil in Asia is the Hechuan Mamenxisaurus orthotype specimen, which recently underwent its first major overhaul since the fossil was mounted in 1965. The specimen of Mamenxisaurus in Hechuan preserved 35 tail vertebrae, and the tail vertebrae were restored according to 55 sections, and the length of the skeleton was disturbed by 2 meters, and the total length increased to 24 meters.

This famous dinosaur fossil in China was discovered in 1957 by a team of petroleum geological exploration team near Taihe Town, Hechuan District, Chongqing City. After the fossil was unearthed, it was handed over to the Chengdu Institute of Geology (now Chengdu University of Technology) in 1961 for safekeeping. Professor Yang Zhongjian, the "father of Chinese dinosaur research", and others named it Hechuan Mamenxisaurus.

The family of dinosaurs that once "dominated" the earth is extremely large. As a genus of sauropod dinosaurs, Mamenxisaurus lived in the late Jurassic period and is famous for its extra-long neck. Its neck length is equivalent to half the length of its body, and the number of cervical vertebrae reaches 19 segments, the most of any known dinosaur.

The adult Mamenxi dragon was huge, with a neck length of nearly 10 meters.

1. British researchers said on March 1, 2017 that they had found the oldest fossil in history in Canada, showing that life existed about 4.3 billion years ago. This means that life on Earth appeared earlier than previously thought.

2. The University College London team published a report in the journal "Nature" pointing out that it is generally believed that the earth was born about 100 million years ago, and the fossils they found in Quebec were formed from now to 100 million years ago, that is, life appeared soon after the formation of the earth. The researchers say that because of the presence of liquid water on both Mars and Earth at the same time, the discovery may suggest that there may also be evidence of life on Mars from 4 billion years ago.

1. The world's largest dinosaur fossil is a titanosaur dinosaur fossil with a body length of more than 40 meters, and this unnamed new dinosaur is also the largest dinosaur found so far.

The fossil was found in the desert of the Patagonian region of Argentina on May 17, when a total of 223 fossils were found at the excavation site, including a huge leg bone of about a meter. The titanosaur fossil was pieced together and measured, and it was found to be 40 meters long and about 20 meters tall, and according to biologists' estimates, the dinosaur should weigh more than 77 tons. It is currently the largest land animal that has ever lived on Earth, and it is also the largest dinosaur in the world, and the smallest dinosaur in the world is only 40 centimeters in size.

The oldest fossils of living organisms are fossils of primitive cells. British researchers said on March 1, 2017, that they had found the oldest fossil in history in Canada, showing that life existed about 4.3 billion years ago. This means that life on Earth appeared earlier than previously thought.

Further information: The word fossil is derived from the Latin fossillis, which means to dig. Fossils are the main research objects of paleontology, which provide evidence for the study of the history of ridge loss of animal and plant life in geological periods.

There have long been records of fossils in ancient Chinese books, such as Ji Ran in the Spring and Autumn Period and Wu Jin in the Three Kingdoms Period, both of which have mentioned dragon bones produced in Shanxi Province, which are fossils of bones and teeth of ancient vertebrates.

In the long geological time, there have been countless creatures living on the earth, and many of the remains of these creatures after death or traces left over from life were buried by the sediment of the time. In the years that followed, the organic matter in the remains of these organisms was decomposed, and the hard parts such as the shells, bones, branches and leaves, along with the surrounding sediment, were petrified and turned into stone, but their original form, structure (and even some subtle internal structures) remained.