Tuesday, May 28, 2019

science news 28.5.2019

Today's selection of science news. Links are normally to press releases on EurekAlert (at the bottom end I may also add a couple of newspaper stories). I include quotes from the summary (using quotation marks) in cases where the title alone doesn't reveal what the story is about. My own thoughts appear without quotation marks, if I have any.


environment

Antibiotics found in some of the world's rivers exceed 'safe' levels, global study finds


food and drink

Exploring the origins of the apple
Recent archaeological finds of ancient preserved apple seeds across Europe and West Asia combined with historical, paleontological, and recently published genetic data are presenting a fascinating new narrative for one of our most familiar fruits. The apple was originally spread by ancient megafauna and later as a process of trade along the Silk Road. When previously separated varieties came into contact, hybridization and grafting allowed for the development of the varieties that we know today.



The wild apples in the Tien Shan Mountains represent the main ancestral population for our modern apple. These trees produce large fruits, which are often red when ripe and have a varying array of flavors. These were the ancestors of the trees that people first started to cultivate and spread along the Silk Road.
Credit: Prof. Dr. Martin R. Stuchtey


humans

Scientists uncover a trove of genes that could hold key to how humans evolved
"New computational analysis finds that more than two dozen human zinc finger transcription factors, previously thought to control activity of similar genes across species have in fact human-specific roles and could help explain how our species came to be."

How language developed: Comprehension learning precedes vocal production
Specifically, monkeys learned to recognise drone noises, but failed to create a new "word" for them.

New causes of autism found in 'junk' DNA


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From the news media

50 years after Apollo 11, another race to the Moon ...



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