AL
国际新闻
Flydubai: What happens when a plane plunges 17,000 feet?
A flight instructor recreates the Flydubai jet’s near-vertical 17,000 foot dive in a simulator.
Al Jazeera – Breaking News, World News and Video from Al Jazeera ·
搜索头条
“feet”
3
AL
科学与环境
Sharks can hear nearly 250 feet away and pinpoint the source
Wild blacktip sharks can detect low-frequency sounds from nearly 250 feet away, according to experiments conducted off the Florida coast. The sharks not only heard the sounds but sharply changed direction away from them, suggesting they could pinpoint where they were coming from.
All Top News -- ScienceDaily ·
AL
科学与环境
Earth’s day isn’t exactly 24 hours. The reason may lie deep inside the planet
Scientists may have solved why the length of Earth’s day changes by a few milliseconds over decades. Subtle shifts in the inner core appear to tug on the mantle, revealing a surprisingly dynamic world thousands of kilometers beneath our feet.
All Top News -- ScienceDaily ·