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Fossil Crab

A 2-mm fossil crab from a piece of amber found in China has updated the knowledge of when land crabs first appeared. The nearly 100-million-year-old fossil, which filled the evolutionary gap, showed that land crabs emerged between 100 and 125 million years ago.

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Since amber patterns were able to contain living things while forming millions of years ago, they provide us with a lot of information about what animals looked like in the distant past and evolution in general. A new piece presents the best preserved of an ancient crab species.

An amber piece found in China excited scientists with the 2 mm crab fossil it contained. The best preserved specimen of its kind, the crab filled an unidentified millions of years of gap in the evolution of crabs. Researchers at the University of Alberta, who examined the fossil, said: “This crab tells us an interesting story about the cycle in which crabs lived. Crab evolution is a hot topic; because many crab-like species have evolved independently throughout history.”

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Until now, the time when crabs left the seas as land crabs and later freshwater crabs had been dated to between 50 and 70 million years ago. These researchers, who analyzed the crab and processed the molecular records created by collecting DNA and RNA differences and similarities, determined that the separation between land and sea occurred between 100 and 125 million years ago.

With the scans made on the computer, it was seen that the 100 million-year-old crab was in ‘perfect’ condition and not a single antenna was missing. The crab, which is estimated to be a juvenile and called “Cretapsara athanata”, is thought to have lived both on land and in fresh water.

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Scientists placed a microelectrode, a brain implant, in the visual center of the brain, and a camera attached to glasses, allowing a blind teacher to see and read letters again.

Technology and scientific developments make life more livable and easier in different fields. One of these areas is the difficulties experienced by people with disabilities who want to live life more easily and equally. To address these challenges, scientists and technologists around the world are doing important work.

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American and Spanish scientists placed a microelectrode in the visual center of a former science teacher, who has been blind for 16 years, and a camera in a glasses so that he could see letters and distinguish objects. The teacher used the microelectrode for six months and did not experience any deterioration in brain activity or other health complications.

According to the study published this week in The Journal of Clinical Investigation, the camera placed in the glasses sends visual data directly to the microelectrode placed in the visual center of the brain and allows that person to see. This technology, which scientists have been working on for years, goes beyond being a dream and a dream. “We have taken an important step forward by demonstrating the potential of such devices to restore functional vision for people who have lost their sight,” said scientist Eduardo Fernandez, from Miguel Hernandez University.

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To test the work, teacher Berna Gomez was played a video game. In the game, the image of Maggie Simpson holding a gun in her left or right hand appeared on a screen and the teacher was asked to know the hand holding the gun correctly. Gomez was able to do this in line with the data interaction between the glasses and the microelectrode. In addition, Gomez was asked to know the letters in the alphabet, but the system could not identify all the letters. He was able to distinguish some of Gómez’s letters, such as ‘I’, ‘L’, ‘C’, ‘V’ and ‘O’. It is reported that this work will continue until May 2024.

To test the work, teacher Berna Gomez was played a video game. In the game, the image of Maggie Simpson holding a gun in her left or right hand appeared on a screen and the teacher was asked to know the hand holding the gun correctly. Gomez was able to do this in line with the data interaction between the glasses and the microelectrode. In addition, Gomez was asked to know the letters in the alphabet, but the system could not identify all the letters. He was able to distinguish some of Gómez’s letters, such as ‘I’, ‘L’, ‘C’, ‘V’ and ‘O’. It is reported that this work will continue until May 2024.

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To test the work, teacher Berna Gomez was played a video game. In the game, the image of Maggie Simpson holding a gun in her left or right hand appeared on a screen and the teacher was asked to know the hand holding the gun correctly. Gomez was able to do this in line with the data interaction between the glasses and the microelectrode. In addition, Gomez was asked to know the letters in the alphabet, but the system could not identify all the letters. He was able to distinguish some of Gómez’s letters, such as ‘I’, ‘L’, ‘C’, ‘V’ and ‘O’. It is reported that this work will continue until May 2024.