BBC News 中文 | 根据科学家的计算,太阳最多大约还有50至60亿年的寿命。而科学家最近所发现的一个天文现象,为我们提供了太阳“寿终正寝”后未来的一瞥。 telegra.ph/太阳寿终正寝之后人类生存的地球上会怎样-12-08
Telegraph
太阳“寿终正寝”之后人类生存的地球上会怎样?
宇宙间万事万物,都是有其寿命的,包括我们人类赖以生存的太阳。 根据科学家的计算,太阳最多大约还有50至60亿年的寿命。 而科学家最近所发现的一个天文现象,为他们提供了几十亿年后当我们的太阳“寿终正寝”后未来的一瞥。 白矮星 天文学家观察到一颗巨大的行星围绕一颗白矮星(white dwarf)在运行。 白矮星通常是恒星在耗尽了核燃料,它的核心就会坍缩成为致密的白矮星。白矮星是低质量恒星演化路线的终点。 恒星在经历红巨星阶段的末期,它的中心会因温度、压力不足以使碳氧元素进行核聚变,从而产生一个致密天体。大部…
BBC News 中文 | 根据科学家的计算,太阳最多大约还有50至60亿年的寿命。而科学家最近所发现的一个天文现象,为我们提供了太阳“寿终正寝”后未来的一瞥。 telegra.ph/太阳寿终正寝之后人类生存的地球上会怎样-12-08-2
Telegraph
太阳“寿终正寝”之后人类生存的地球上会怎样?
宇宙间万事万物,都是有其寿命的,包括我们人类赖以生存的太阳。 根据科学家的计算,太阳最多大约还有50至60亿年的寿命。 而科学家最近所发现的一个天文现象,为他们提供了几十亿年后当我们的太阳“寿终正寝”后未来的一瞥。 白矮星 天文学家观察到一颗巨大的行星围绕一颗白矮星(white dwarf)在运行。 白矮星通常是恒星在耗尽了核燃料,它的核心就会坍缩成为致密的白矮星。白矮星是低质量恒星演化路线的终点。 恒星在经历红巨星阶段的末期,它的中心会因温度、压力不足以使碳氧元素进行核聚变,从而产生一个致密天体。大部…
BBC News 中文 | 根据科学家的计算,太阳最多大约还有50至60亿年的寿命。而科学家最近所发现的一个天文现象,为我们提供了太阳“寿终正寝”后未来的一瞥。 telegra.ph/太阳寿终正寝之后人类生存的地球上会怎样-12-08-3
Telegraph
太阳“寿终正寝”之后人类生存的地球上会怎样?
宇宙间万事万物,都是有其寿命的,包括我们人类赖以生存的太阳。 根据科学家的计算,太阳最多大约还有50至60亿年的寿命。 而科学家最近所发现的一个天文现象,为他们提供了几十亿年后当我们的太阳“寿终正寝”后未来的一瞥。 白矮星 天文学家观察到一颗巨大的行星围绕一颗白矮星(white dwarf)在运行。 白矮星通常是恒星在耗尽了核燃料,它的核心就会坍缩成为致密的白矮星。白矮星是低质量恒星演化路线的终点。 恒星在经历红巨星阶段的末期,它的中心会因温度、压力不足以使碳氧元素进行核聚变,从而产生一个致密天体。大部…
Researchers report the discovery of three cell types in the eye that detect light and align the brain's circadian rhythm to our ambient light to help the brain tell day from night and establish healthy day-night cycles -- the 1st direct assessment in humans of light responses from these cells.
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Salk Institute for Biological Studies
Three types of cells help the brain tell day from night - Salk Institute for Biological Studies
LA JOLLA—Bright light at night interrupts the body’s normal day-night cycles, called circadian rhythms, and can trigger insomnia. In fact, circadian rhythms play a major role in health. Disrupted day-night cycles have even been linked to increased incidence…
The first ever study of its kind in reptiles has found that even the bearded dragon falls for an optical illusion that we humans succumb to, providing evidence that at least one reptile can be counted among animals don’t simply passively process retinal signals, but actively interpret visual data.
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Research Digest
Here’s The First Evidence That Even Lizards Succumb To Optical Illusions
By Emma Young. Bearded dragon appears to actively interpret visual data rather than passively process retinal signals.
BBC News 中文 | 在我们这个星球的历史上,大规模的火山喷发曾经毁灭过生命。那么一次超级火山喷发会导致人类文明消亡吗?
telegra.ph/超级火山喷发是否会导致人类毁灭-12-09 https://t.co/6tkXjp3RFr
telegra.ph/超级火山喷发是否会导致人类毁灭-12-09 https://t.co/6tkXjp3RFr
Telegraph
超级火山喷发是否会导致人类毁灭?
在意大利那不勒斯湾,有迹象显示欧洲最臭名昭著的火山巨人正在从长眠中苏醒过来。 坎皮佛莱格瑞(Campi Flegrei),一个也可翻译为"燃烧场"的火山,是一座超级火山。它由数十万年前形成的广泛而复杂的地下网络组成,从那不勒斯郊区延伸到地中海下方。约有50万人生活在坎皮佛莱格瑞的七英里长的火山口,该火山口由20万、3万9千、3万5千和12万年前的大规模火山爆发形成。 过去500年来,坎皮佛莱格瑞相当平静。自1538年以来一直没有爆发,一个相对较小的喷发导致形成了一座"新山" ——诺沃山(Monte Nu…
Study found that rats’ accuracy increased with reaction time, whereas humans’ accuracy decreased with reaction time in the same task
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Frontiers
The Interaction Between Elapsed Time and Decision Accuracy Differs Between Humans and Rats
A stochastic visual motion discrimination task is widely used to study rapid decision-making in humans and animals. Among trials of the same sensory difficulty within a block of fixed decision strategy, humans and monkeys are widely reported to make more…
Research has found we are living in the fastest period of urban growth in human history. By 2030, more than 2 billion additional people are expected to be living in cities, a pace of urban growth that is the equivalent to building a city the size of New York City every six weeks
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Newsroom
Cities and their rising impacts on biodiversity - a global overview
Cities and their rising impacts on biodiversity versity. To gain a clearer picture of the situation, an international group of scientists, including Professor Andrew Gonzalez from McGill’s Biology
Medicaid expansion doubled access to primary care and increased attention to health risks, finds a new study of low-income enrollees in the Healthy Michigan Plan (n=4,090).
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labblog.uofmhealth.org
Medicaid Expansion Doubled Access to Primary Care and Increased Attention to Health Risks in Low-Income Michiganders
Medicaid expansion in Michigan emphasized primary care and prevention, and based financial incentives for enrollees on examining health risks and engaging in healthy behaviors. Two new studies look at the results.
The natural terpenes in marijuana are removed during distillation to produce pure THC in e-liquids for vaping, and then added back in for taste and smell, but they can produce toxic chemicals in the vapor users inhale, such as benzene, methacrolein, xylenes, toluene, styrene and ethylbenzene.
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UPI
Terpenes in marijuana vaping products may produce toxic chemicals
The natural terpenes in marijuana are removed during distillation to produce pure THC for e-liquids and concentrates, and then added back in for taste and smell.
Nearly eight out of 10 girls in a region of mid-Western Nepal sleep in dangerous outdoor "menstruation huts" during their period, despite the practice being outlawed. The girls often reported feeling heightened "stress, anxiety, and disempowerment" during their time in the huts
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CNN
Girls in Nepal sleep in 'menstruation huts' despite ban, study finds
Nearly eight out of 10 girls in a region of mid-Western Nepal sleep in dangerous outdoor "menstruation huts" during their period, despite the practice being outlawed, a study has found.
The "presence" of meaning in life peaks around 60 years old, and is correlated with better physical and mental health in older adults (n=1,042). The search for meaning in life follows a u-shaped curve where people younger than 60 and older tend to be actively seeking purpose.
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Inverse
Scientists pinpoint the age you're most likely to find meaning in life
The quest for purpose follows a pattern -- and it never really ends.
Killer whale grandmothers increase fitness of their grandchildren, which could explain why they have evolved the longest post-reproductive lifespan of all nonhumans.
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PNAS
Postreproductive killer whale grandmothers improve the survival of their grandoffspring | Proceedings of the National Academy of…
Understanding why females of some mammalian species cease ovulation prior to the end
of life is a long-standing interdisciplinary and evolutionary ...
of life is a long-standing interdisciplinary and evolutionary ...
DW 中文- 德国之声 | 随着中国影响力的与日俱增,中国式人权标准也在国际舞台上越来越有市场。联合国人权理事会上,批评中国人权的提案很难提交或通过。而联合国正式决议中,"人类命运共同体"等中式术语却频繁出现。 p.dw.com/p/3UYYq
Deutsche Welle
德语媒体:中国式人权定义
对中国政府来说,只要经济能够保持发展,人权等议题就可以搁置一边。
Potentially toxic chemicals from LCDs in nearly half of household dust samples tested. Researchers are sounding the alarm about liquid crystal monomers--the chemical building blocks of everything from flat screen TVs to solar panels--and the potential threat they pose to humans and the environment.
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EurekAlert!
Potentially toxic chemicals from LCDs in nearly half of household dust samples tested
Chemicals commonly used in smartphone, television, and computer displays were found to be potentially toxic and present in nearly half of dozens of samples of household dust collected by a team of toxicologists led by the University of Saskatchewan (USask).…