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Showing results 31-40 of 40 for 'Evolution'


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    Microbes Go, Too: ""Fecal Prints"" Provide Record of Life on Earth

    If it eats, it excretes – including microbes. Having digested organic matter on Earth for about 3.5 billion years, their waste contains a record of how our environment has changed. However, no one has been able to interpret the information in microbial ""fecal prints""– until now. Weizmann's Dr. Itay Halevy and McGill's Dr. Boswell Wing have cracked the case.

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    Signs of Aging, Even in the Embryo

    Dr. Valery Krizhanovsky and two other researchers have each discovered senescence (aging) in the earliest stages of life. When a cell is too damaged, it turns senescent and summons the immune system to kill it. As The New York Times reports, these ""discoveries raise the prospect that the dawn and dusk of life are intimately connected.""

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    Evolution Not Only About Natural Selection but Also Improvisation, Says Israeli Scientist

    Prof. Yoav Soen sounds almost angry when he talks about the evolutionary concept of natural selection – or, more precisely, its total acceptance – suggesting it blinds people to thinking more broadly. Instead, they simply embrace the theory of evolution developed more than 150 years ago by Charles Darwin. The blind allegiance to natural selection is a worldwide phenomenon, which is reflected in how research is conducted and scientific questions are explained, says the biomolecular scientist at the Weizmann Institute of Science, Rehovot.

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    Spare Parts Might “Jump-Start” Protein Design

    The idea of proteins that can be designed on computers for specific functions has been a cutting-edge concept that has stubbornly remained “in the future.” New research at the Weizmann Institute of Science may bring that future a bit closer. By going back to nature’s drawing board – evolution – the scientists have created new proteins, based on “existing natural parts,” that carry out their intended function with flying colors. These findings were reported in the Proceedings of the National Academy of Sciences (PNAS).

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    Scallops Have Eyes, and Each One Builds a Beautiful Living Mirror

    In 2019, if everything goes according to plan, the much-delayed James Webb Space Telescope will finally launch into orbit. Once assembled, it will use an array of 18 hexagonal mirrors to collect and focus the light from distant galaxies. This segmented-mirror design was developed in the 1980s, and it has been so successful that it will feature in almost all the large telescopes to be built in the near future. But as always, nature got there first. For millions of years, scallops have been gazing at the world using dozens of eyes, each of which has a segmented mirror that’s uncannily similar to those in our grandest telescopes. And scientists have just gotten a good look at one for the first time.

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    Uncovering Varied Pathways to Agriculture

    Around 15,000 years ago, the Natufian culture appeared in what is today’s Middle East. This culture, which straddled the border between nomadic and settled lifestyles, had diverse, complex origins – much more than researchers had assumed. This finding arises from new research by a team of scientists and archaeologists from the Weizmann Institute of Science and the University of Copenhagen.

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