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Telomere extension turns back aging clock in cultured human cells, study finds

Telomere extension turns back aging clock in cultured human cells, study finds
A new procedure can quickly and efficiently increase the length of human telomeres, the protective caps on the ends of chromosomes that are linked to aging and disease, according to scientists at the Stanford University School of Medicine. Treated cells behave as if they are much younger than untreated cells, multiplying with abandon in the…
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DNA clock helps to get measure of people’s lifespans

DNA clock helps to get measure of people’s lifespans
Scientists have identified a biological clock that provides vital clues about how long a person is likely to live. Researchers studied chemical changes to DNA that take place over a lifetime, and can help them predict an individual's age. By comparing individuals' actual ages with their predicted biological clock age, scientists saw a pattern emerging.…
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How Earth’s earliest life overcame a genetic paradox

How Earth’s earliest life overcame a genetic paradox
On ancient Earth, the earliest life encountered a paradox. Chains of RNA—the ancestor of DNA—were floating around, haphazardly duplicating themselves. Scientists know that eventually, these RNA chains must have become longer and longer, setting the stage for the evolution of complex life forms like amoebas, worms, and eventually humans. But under all current models, shorter…
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Nanoparticle drug stops cancer’s spread in mice

Nanoparticle drug stops cancer’s spread in mice
When a person dies from cancer, the culprit is usually not the original tumor but rather the cancerous cells that spread throughout the body and replicate in distant organs, a process called metastasis. Researchers have long known that metastasizing cancer cells slip their bonds and avoid immune detection by altering the sugars on their surfaces.…
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Fossil ankles indicate Earth’s earliest primates lived in trees

Fossil ankles indicate Earth’s earliest primates lived in trees
Earth's earliest primates have taken a step up in the world, now that researchers have gotten a good look at their ankles. A new study has found that Purgatorius, a small mammal that lived on a diet of fruit and insects, was a tree dweller. Paleontologists made the discovery by analyzing 65-million-year-old ankle bones collected…
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Out of the pouch: Ancient DNA extracted from extinct giant kangaroos

Out of the pouch: Ancient DNA extracted from extinct giant kangaroos
Scientists have finally managed to extract DNA from Australia's extinct giant kangaroos ─ the mysterious marsupial megafauna that roamed Australia over 40,000 years ago. A team of scientists led by Dr Bastien Llamas and Professor Alan Cooper from the University of Adelaide's Australian Centre for Ancient DNA (ACAD) have extracted DNA sequences from two species:…
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First contracting human muscle grown in laboratory

First contracting human muscle grown in laboratory
In a laboratory first, Duke researchers have grown human skeletal muscle that contracts and responds just like native tissue to external stimuli such as electrical pulses, biochemical signals and pharmaceuticals. The lab-grown tissue should soon allow researchers to test new drugs and study diseases in functioning human muscle outside of the human body. The study was…
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Evolution of color in plants and animals

Evolution of color in plants and animals
Researchers have looked at a species of fish to help unravel one of the biggest mysteries in evolutionary biology. In many species of plants and animals, individuals from the same population often come in different color variants. But the mystery has remained as to why one color doesn't eventually replace the other through natural selection.…
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