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Scientists report finding fossilized red blood cells in dinosaur bone

Researchers say chemical tests on a 115-million-year-old Aratasaurus leg bone found structures resembling red blood cells and traces of heme. Some experts caution the structures have not been definitively identified as blood cells.

Science & Health · Research · 4 outlets (L 1 · C 1 · R 1 · 1 not rated)

Bull and male donkey form unusual bond in Ethiopia, researchers report

Researchers studying monkeys in Ethiopia documented repeated mounting and affectionate behavior between Achille, a bull, and Patroclo, a male donkey, over four days. Scientists say the observations suggest same-sex behavior may help foster social bonds.