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Reading the Repeats: Cells transcribe telomere DNA
Scientists have discovered that human cells make RNA transcripts of telomeres, the repetitive DNA at the ends of chromosomes, a finding that could have implications for understanding aging and cancer.
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PaleontologyWhales started small
The ancestors of whales, some of which are the largest creatures ever to evolve, probably were mammals no larger than a fox.
By Sid Perkins -
Damage Control: Brain injuries fight off PTSD in vets
Damage to either of two brain regions protects combat veterans against developing the severe stress ailment known as post-traumatic stress disorder, a finding with implications for treating this condition.
By Bruce Bower -
AstronomyTwinkle, Twinkle: Dark matter may have lit up first stars
The earliest stars in the universe might have been fueled by dark matter instead of nuclear fusion.