أخبار العالم
Clock ticking for leap second: Why timekeeping could change forever
المصدر: Al Jazeera – Breaking News, World News and Video from Al Jazeera · نُشر
Timekeepers add a leap second occasionally to keep our clocks and the Earth's rotation in tune. That could now change.
Timekeepers add a leap second occasionally to keep our clocks and the Earth's rotation in tune. That could now change.
أخبار ذات صلة
Kenya confirms second Ebola case - a relative of the first victim
It follows the death last week of a man who had arrived in Kenya after travelling from DR Congo.
feeds.bbci.co.uk ·
Climate change and drone attacks exacerbate the humanitarian crisis in war-torn Sudan
Aid groups warn of an imminent collapse of the health system as fighting continues to displace civilians amid the planting season. The UN has extended an arms embargo, but only for Darfur.
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Why caring about climate change does not always translate into greener holidays
Tourists who care deeply about sustainability are not necessarily willing to pay extra to reduce the environmental impact of their vacations, according to new research from the University of Portsmouth.
Phys.org - latest science and technology news stories ·
New chip-scale gyroscope measures rotation with unprecedented sensitivity
Researchers have developed a chip-scale optical ring-laser gyroscope that can measure rotation as slow as 37 degrees per hour. This record sensitivity, approaching Earth's rotation rate of 15 degrees per hour, could eventually be useful for precision navigation and orientation sy
Phys.org - latest science and technology news stories ·
Urbanization takes a bigger toll on bird diversity in the tropics than it does at other latitudes, study finds
Researchers at McGill University have found that urbanization is weakening one of Earth's most enduring ecological patterns: the tendency for biodiversity to increase toward the tropics, a pattern known as the latitudinal diversity gradient.
Phys.org - latest science and technology news stories ·