Science News Briefs from around the World: June 2023

Bulgaria, Hungary, Romania

The Yamnaya have a long association with horses and are now known as the oldest riders. Skeletons from around 3000 B.C. unearthed from burial mounds in Eastern Europe show wear patterns consistent with ‘jockey syndrome’ and are the earliest direct evidence of human riding on horses.

China

of mamenchisaurus, Thanks to its 50-foot neck, a giant sauropod, possibly the longest known animal, it may have once munched on the tops of trees in what is now China. The researchers estimated its neck length by comparing fossilized vertebrae with the skeletons of smaller sauropod species.

Nepal

Scientist found dormant Streptococcus and Staphylococcus Bacteria in soil samples from Mount Everest at an altitude of 26,000 feet. It is believed to have been left behind by an infected climber years ago. This bacterium is surprisingly resilient and will multiply when thawed.

sea ​​bream

Anthropologists have observed that monkeys in Phang Nga Bay crack nuts with stones, crushing and discarding sharp pieces reminiscent of early human tools. Scientists conclude that the early steps into toolmaking may have occurred by chance, perhaps earlier in human evolution than previously thought.

Ukraine

Genetic analysis has revealed that Chernobyl stray dogs are descendants of abandoned pets who lived nearby during the 1986 Chernobyl nuclear disaster. Studying the survival of feral dogs in radioactive habitats may help researchers understand how long-term radiation exposure affects humans.

we

Storms can cause raw sewage to flow into the ocean, and a study of San Diego beaches showed that this pollution can get into the sea spray. His three-quarters of the bacteria found in the air on beaches came from this source, exposing people avoiding the ocean to the bacteria as well.

For more information, please visit www.ScientificAmerican.com/jun2023/advances.

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