Ancient giant tortoise fossils found in Colombian Andes

Paleontologists have discovered giant tortoise fossils in Colombia dating back some 57 million years, the university leading the excavation said, with the findings key to understanding South America's prehistoric eras.

Researchers uncover human DNA repair by nuclear metamorphosis

Researchers at the University of Toronto have discovered a DNA repair mechanism that advances understanding of how human cells stay healthy, and which could lead to new treatments for cancer and premature aging.

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