上海千花mm自荐

China’s first deep-sea multi-functional scientific investigation and cultural relic archaeological vessel set to be completed in 2025

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Construction on China's first deep-sea multi-functional scientific investigation and cultural relic archaeological vessel officially began in Nansha, Guangzhou, South China's Guangdong Province on Sunday. The ship is expected to be completed and put into operation in 2025, CCTV reported on Monday. According to the report, the ship has a total design length of approximately 103 ... Read more

Update: 21 people die and 6 are missing due to mountain flooding and mudslides caused by heavy rainfall in Xi’an, NW China’s Shaanxi Province

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Twenty-one people have died and another six are missing as of Sunday evening after heavy rainfall hit Xi’an, Northwest China’s Shaanxi Province, and caused mountain floods and mudslides on Friday evening.  Due to the impact of short-duration heavy rain, mountain floods and mudslides struck a village in Chang’an district in Xi’an around 6 pm on ... Read more

New tyrannosaur bridges gap from medium to monstrous

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A fossil from a new species of dinosaur is helping to bridge a crucial 20-million-year gap in tyrannosaur evolution. The key fossil is a 90-million-year-old, grapefruit-sized partial skull from Uzbekistan’s Bissekty Formation. This tyrannosaur braincase, the first well-preserved one found from the mid-Cretaceous period, shows that, although still small, tyrannosaurs of the time already had ... Read more

Five things to know about Zika

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The mysteries of the Zika virus are slowly but surely succumbing to the scientific method. Last week, scientists revealed the virus’ structure, gleaned further insight into its ties to the birth defect microcephaly and found out just how little some people seem to know about Zika. Public health researchers at Harvard University released the results ... Read more

Itty bitty engine puts a single atom to work

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A team of scientists has built a heat engine out of a single atom. Heat engines, like steam engines or internal combustion engines, convert heat into motion. To create the minuscule engine, physicist Johannes Roßnagel of University of Mainz and colleagues heated and cooled a calcium ion with an electric field and a laser, causing ... Read more

Leptospirosis bacterium still haunts swimming holes

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Danger in ‘swimming hole’  — As warm weather approaches, the old swimming hole will again beckon boys and girls in farm areas. But disease germs lurk in waters exposed to cattle and other animals…. One “swimming hole disease” called leptospirosis is caused by water-borne Leptospira pomona…. Warm summer temperatures are ideal for maintaining leptospiral organisms ... Read more

Despite misuses, statistics still has solid foundation

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In many realms of science today, “statistical wisdom” seems to be in short supply. Misuse of statistics in scientific research has contributed substantially to the widespread “reproducibility crisis” afflicting many fields (SN: 4/2/16, p. 8; SN: 1/24/15, p. 20). Recently the American Statistical Association produced a list of principles warning against multiple misbeliefs about drawing ... Read more

Antibiotics in cattle leave their mark in dung

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Overuse of antibiotics in livestock can spread drug-resistant microbes — via farm workers or even breezy weather. But there’s more than one reason stay upwind of drugged cattle. Dung beetles (Aphodius fossor) make their living on cattle dung pats, which are rich in nutritious microbes. To investigate the effects of cattle antibiotics on this smaller ... Read more

Tiny plastics cause big problems for perch, lab study finds

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Editor’s note: On May 3, 2017, Science retracted the study described in this article. Based on findings from a review board at Uppsala University, Science cites three reasons for pulling the study: The experiments lacked ethical approval, the original data do not appear in the paper and questions emerged about experimental methods. Microscopic pieces of ... Read more

Sounds from gunshots may help solve crimes

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The surveillance video shows a peaceful city streetscape: People walking, cars driving, birds chirping. “Then, abruptly, there’s the sound of gunfire,” said electrical engineer Robert Maher. “A big bang followed by another bang.” Witnesses saw two shooters facing off, a few meters apart — one aiming north, the other south. But no one knew who shot first. ... Read more