[ad_1]
Prehistoric men have invented tools several times, according to researchers who discovered a collection of 327 stone carvings more than 2.58 million years ago.
This is the first evidence of ancient hominids sharpening stones to create specific tools, according to a new study conducted by Arizona State University and George Washington University.
The collection of Oldowan tools, created by cutting stone fragments, was discovered in the Afar region of northeastern Ethiopia. They were probably made so that our ancestors could cut meat.
We will tell you what is true. You can form your own view.
Of
15p
$ 0.18
$ 0.18
$ 0.27
one day, more exclusive, analyzes and supplements.
Prior to this discovery, the oldest Oldowan tool example was discovered in Gona, Ethiopia, at 2.56 million years old. It was widely accepted that this technology was invented once, and then broadcast throughout the continent.
However, this latest study, published in Proceedings of the National Academy of Sciences, proves that this theory is false. It is now thought that Oldowan tools were invented time and time again by several groups of hominids before becoming an essential tool for human survival.
1/20 Elephant poaching rates down in Africa
An international study found that African elephant poaching rates have dropped 60% in six years.
It is thought that this decline could be associated with the ban on ivory trade introduced in China in 2017.
Reuters
2/20 Ancient four-legged whale discovered in Peru
Scientists have identified a four-legged creature, webbed feet, as an ancestor of the whale. The fossils discovered in Peru have led scientists to conclude that the enormous creatures that cross the planet's oceans descend from small-legged ancestors that lived in South Asia 50 million years ago.
A. Gennari
3/20 Animal with transient anus discovered
A scientist fell on a creature with a "transient anus" that only appears when necessary, before disappearing completely. Dr. Sidney Tamm, of the Marine Biology Laboratory, initially found no evidence of anus on this species. However, when the animal fills up, a pore opens to evacuate the waste.
Steven G Johnson
4/20 Giant bee spotted
Feared to disappear, Wallace's bee Giant was spotted for the first time in nearly 40 years. An international team of environmental advocates spotted the bee, four times larger than a typical honey bee, during an expedition to a group of Indonesian islands.
Clay bolt
5/20 New mammal species found inside the crocodile
Fossilized bones digested by crocodiles revealed the existence of three new mammal species that roamed the Cayman Islands 300 years ago. The bones belonged to two large species of rodents and a small animal resembling a shrew
Museum of Natural History of New Mexico
6/20 Fabric that changes according to the temperature created
Scientists from the University of Maryland have created a fabric that adapts to heat, expanding to allow more heat to escape from the body when it is hot and compact. to retain more heat when it's cold
Faye Levine, University of Maryland
7/20 Tears from baby mice could be used in pest control
A study from the University of Tokyo found that the tears of baby mice make female mice less interested in men's sexual advances
Getty
8/20 Last warning to limit the "climate catastrophe"
The Intergovernmental Panel on Climate Change released a report in which it is projected the impact of a rise in global temperature of 1.5 degrees Celsius and warns against a faster increase
Getty
9/20 Nobel Prize for Chemists of Evolution
The Nobel Prize in Chemistry was awarded to three chemists working with the evolution. Frances Smith receives the award for her work on the direction of enzyme evolution, while Gregory Winter and George Smith are rewarded for their work on phage display of peptides and antibodies
Getty / AFP
10/20 Nobel Prize for Laser Physicists
The Nobel Prize in Physics was awarded to three physicists working with lasers. Arthur Ashkin (L) has been rewarded for his "optical tweezers" that use lasers to capture particles, atoms, viruses and other living cells. Donna Strickland and Gérard Mourou were jointly awarded the prize for the development of amplification of pulsed pulsed lasers
Reuters / AP
11/20 Discovery of a new dinosaur species
Ledumahadi Mafube wandered about 200 million years ago in what is now South Africa. Recently discovered by a team of international scientists, he was the largest land animal of his time, weighing 12 tons and weighing 13 feet. In Sesotho, the South African language of the region in which the dinosaur was discovered, its name means "a giant thunderbolt at dawn"
Viktor Radermacher / SWNS
12/20 Birth of a planet
Scientists witnessed the birth of a planet for the very first time.
This spectacular image of the SPHERE instrument on ESO's very large telescope is the first clear image of a planet caught red-handed training around the dwarf star PDS 70. The Planet appears clearly, visible in the form of a bright spot on the right of the screen. center of the image, masked by the coronagraph mask used to block the blinding light of the central star.
ESO / A. Müller et al
13/20 New human organ discovered that scientists previously lacked
The layers long considered dense, connective tissue are actually a series of fluid-filled compartments that researchers have dubbed "interstitium".
These compartments are under the skin and line the intestines, lungs, blood vessels and muscles and join together to form a network supported by a mesh of strong and flexible proteins.
Getty
14/20 According to an archaeologist, a previously unknown society lived in the Amazon rainforest before the arrival of Europeans
Working in the Brazilian state of Mato Grosso, a team led by archaeologists from the University of Exeter has uncovered hundreds of villages hidden in the depths of the rainforest.
These excavations included evidence of fortifications and mysterious earthworks called geoglyphs
José Iriarte
15/20 One in 10 people have traces of cocaine or heroin on fingerprints, according to a study
Scientists have discovered that more than one in 10 people had traces of Class A drugs on their fingers after developing a new fingerprint-based drug test.
Using a sensitive analysis of the chemical composition of sweat, researchers were able to differentiate between those who had been directly exposed to heroin and cocaine and those who had encountered it indirectly.
Getty
16/20 NASA publishes great images of Jupiter's big red dot
The storm is bigger than the Earth has swirled for 350 years. The colors of the image have been improved after returning to Earth.
Pictures of: Tom Momary
17/20 3D reconstruction of a gray parrot from Africa after euthanasia
Included in the Wellcome Image Awards, this 3D image of an African Gray Parrot shows the highly complex system of blood vessels.
Scott Birch. Welcome pictures
18/20 Baby Hawaiian Squid
Another winner of the Wellcome Images Award, this time from the baby squid Hawaiian. The black ink bag and light organ located in the center of the squid mantle cavity are clearly visible.
Macroscopic solutions. Welcome pictures
19/20 Skeletons of 5,000-year-old Chinese 'giants' discovered by archaeologists
People are thought to be exceptionally tall and strong. Largest open skeleton measured at 1.9 m
Youtube
20/20 NASA finds a hole in the sun 75,000 km wide
Sunspots are caused by interactions with the Sun's magnetic field and are colder areas on the surface of the star.
Nasa
1/20 Elephant poaching rates down in Africa
An international study found that African elephant poaching rates have dropped 60% in six years.
It is thought that this decline could be associated with the ban on ivory trade introduced in China in 2017.
Reuters
2/20 Ancient four-legged whale discovered in Peru
Scientists have identified a four-legged creature, webbed feet, as an ancestor of the whale. The fossils discovered in Peru have led scientists to conclude that the enormous creatures that cross the planet's oceans descend from small-legged ancestors that lived in South Asia 50 million years ago.
A. Gennari
3/20 Animal with transient anus discovered
A scientist fell on a creature with a "transient anus" that only appears when necessary, before disappearing completely. Dr. Sidney Tamm, of the Marine Biology Laboratory, initially found no evidence of anus on this species. However, when the animal fills up, a pore opens to evacuate the waste.
Steven G Johnson
4/20 Giant bee spotted
Feared to disappear, Wallace's bee Giant was spotted for the first time in nearly 40 years. An international team of environmental advocates spotted the bee, four times larger than a typical honey bee, during an expedition to a group of Indonesian islands.
Clay bolt
5/20 New mammal species found inside the crocodile
Fossilized bones digested by crocodiles revealed the existence of three new mammal species that roamed the Cayman Islands 300 years ago. The bones belonged to two large species of rodents and a small animal resembling a shrew
Museum of Natural History of New Mexico
6/20 Fabric that changes according to the temperature created
Scientists from the University of Maryland have created a fabric that adapts to heat, expanding to allow more heat to escape from the body when it is hot and compact. to retain more heat when it's cold
Faye Levine, University of Maryland
7/20 Tears from baby mice could be used in pest control
A study from the University of Tokyo found that the tears of baby mice make female mice less interested in men's sexual advances
Getty
8/20 Last warning to limit the "climate catastrophe"
The Intergovernmental Panel on Climate Change released a report in which it is projected the impact of a rise in global temperature of 1.5 degrees Celsius and warns against a faster increase
Getty
9/20 Nobel Prize for Chemists of Evolution
The Nobel Prize in Chemistry was awarded to three chemists working with the evolution. Frances Smith receives the award for her work on the direction of enzyme evolution, while Gregory Winter and George Smith are rewarded for their work on phage display of peptides and antibodies
Getty / AFP
10/20 Nobel Prize for Laser Physicists
The Nobel Prize in Physics was awarded to three physicists working with lasers. Arthur Ashkin (L) has been rewarded for his "optical tweezers" that use lasers to capture particles, atoms, viruses and other living cells. Donna Strickland and Gérard Mourou were jointly awarded the prize for the development of amplification of pulsed pulsed lasers
Reuters / AP
11/20 Discovery of a new dinosaur species
Ledumahadi Mafube wandered about 200 million years ago in what is now South Africa. Recently discovered by a team of international scientists, he was the largest land animal of his time, weighing 12 tons and weighing 13 feet. In Sesotho, the South African language of the region in which the dinosaur was discovered, its name means "a giant thunderbolt at dawn"
Viktor Radermacher / SWNS
12/20 Birth of a planet
Scientists witnessed the birth of a planet for the very first time.
This spectacular image of the SPHERE instrument on ESO's very large telescope is the first clear image of a planet caught red-handed training around the dwarf star PDS 70. The Planet appears clearly, visible in the form of a bright spot on the right of the screen. center of the image, masked by the coronagraph mask used to block the blinding light of the central star.
ESO / A. Müller et al
13/20 New human organ discovered that scientists previously lacked
The layers long considered dense, connective tissue are actually a series of fluid-filled compartments that researchers have dubbed "interstitium".
These compartments are under the skin and line the intestines, lungs, blood vessels and muscles and join together to form a network supported by a mesh of strong and flexible proteins.
Getty
14/20 According to an archaeologist, a previously unknown society lived in the Amazon rainforest before the arrival of Europeans
Working in the Brazilian state of Mato Grosso, a team led by archaeologists from the University of Exeter has uncovered hundreds of villages hidden in the depths of the rainforest.
These excavations included evidence of fortifications and mysterious earthworks called geoglyphs
José Iriarte
15/20 One in 10 people have traces of cocaine or heroin on fingerprints, according to a study
Scientists have discovered that more than one in 10 people had traces of Class A drugs on their fingers after developing a new fingerprint-based drug test.
Using a sensitive analysis of the chemical composition of sweat, researchers were able to differentiate between those who had been directly exposed to heroin and cocaine and those who had encountered it indirectly.
Getty
16/20 NASA publishes great images of Jupiter's big red dot
The storm is bigger than the Earth has swirled for 350 years. The colors of the image have been improved after returning to Earth.
Pictures of: Tom Momary
17/20 3D reconstruction of a gray parrot from Africa after euthanasia
Included in the Wellcome Image Awards, this 3D image of an African Gray Parrot shows the highly complex system of blood vessels.
Scott Birch. Welcome pictures
18/20 Baby Hawaiian Squid
Another winner of the Wellcome Images Award, this time from the baby squid Hawaiian. The black ink bag and light organ located in the center of the squid mantle cavity are clearly visible.
Macroscopic solutions. Welcome pictures
19/20 Skeletons of 5,000-year-old Chinese 'giants' discovered by archaeologists
People are thought to be exceptionally tall and strong. Largest open skeleton measured at 1.9 m
Youtube
20/20 NASA finds a hole in the sun 75,000 km wide
Sunspots are caused by interactions with the Sun's magnetic field and are colder areas on the surface of the star.
Nasa
Kaye Reed, associate researcher at the Institute of Human Origins at the University of Arizona State, has L & # 39; Independent"This is the first time we see people tearing pieces of stone to make tools with an end in mind. They only removed two or three flakes, and some you can say were not taken off properly.
"The newest tools look slightly different from the way they were designed from other examples."
The tools were found near the oldest fossil attributed to the genus Homo, which is found on a dig site called Bokol Dora 1 or BD 1 in Ethiopia. For the past five years, researchers have been trying to determine if there is a link between the origins of our gender and the creation of a systematic manufacture of stone tools.
The breakthrough occurred when Christopher Campisano, a geologist from the University of Arizona State, saw sharp stone tools pulling sediment down a steep and eroded slope. It's there that they found hundreds of small pieces of chipped stones.
Researchers have discovered a collection of Oldowan tools in the Afar region of northeastern Ethiopia (Erin DiMaggio)
"These tools were abandoned by the first humans at the edge of a water source, then quickly buried. The site has remained so for millions of years, "said geoarchaeologist Vera Aldeias of the Algarve University in Portugal.
Our ancestors made and used tools for a million years before this last discovery. Old "percussion" stone tools, described as "Lomekwian" tools, were first discovered in Kenya 3.3 million years ago.
Like monkeys and chimpanzees, these early hominids used tools to pound and slaughter foods such as nuts and shellfish. However, something changed 2.6 million years ago and our ancestors became more accurate and more apt to hit the edge of the stones to make tools.
BD 1 artifacts capture this change.
1/2 pg-20-monkey-1.jpg
Artist's impression of Archicebus achilles, the oldest known primate
2/2 pg-20-monkey-2.jpg
The fossilized skeleton of Archicebus Achilles
1/2 pg-20-monkey-1.jpg
Artist's impression of Archicebus achilles, the oldest known primate
2/2 pg-20-monkey-2.jpg
The fossilized skeleton of Archicebus Achilles
"We expected to see an indication of a Lomekwian evolution to these early Oldowan tools," said Will Archer of the Max Planck Institute for Evolutionary Anthropology in Leipzig and New York. University of Cape Town.
"Yet, when we looked closely at the models, there was very little connection to what is known of the older archaeological sites or the tools made by modern primates," he said. .
This change coincided with a change in the teeth of our ancestor. When our ancestors began to process food before eating with stone tools, we began to notice a reduction in the size of their teeth.
David Braun, an archaeologist from George Washington University and senior author of the newspaper, said; "Given that primate species around the world regularly use stone hammers to search for new resources, it seems very likely that many human ancestors have found new ways to use stone artifacts to extract resources." their environment.
"If our hypothesis is correct, then we would expect to find a kind of continuity in the form of artifact after 2.6 million years, but not before that period. We have to find more sites. "
Dr. Reed said, "Our team is returning to the field early next year and we will be doing additional searches in other localities and we will continue to look for other hominids who have made the site. # 39; tool. "
[ad_2]
Source link