Other
You may have seen the news Qantas flight 144 from Auckland landed safely in Sydney yesterday after the pilot was forced to shut down an engine and issue a mayday call while flying over the Pacific Ocean.
Jan 19, 2023
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Energy & Green Tech
Smart windows that control the amount of heat that enters or leaves a building can reduce the need for energy-intensive air conditioning units and help efforts to retrofit Europe's buildings to make them more energy efficient.
Mar 11, 2021
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Consumer & Gadgets
You're inside on a scorching 40°C day, running your air conditioner on full for extended hours. Normally, you might worry about cost—or even the impact on the grid or the environment. But you've got solar on your roof, ...
Dec 21, 2023
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Engineering
Over the last few years of frequent and intense wildfire seasons, many parts of the U.S. have experienced hazardous air quality for days on end. At the same time a number of low-cost air quality monitors have come on the ...
Aug 18, 2020
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Automotive
There is a new sight on the streets of Havana: increasing numbers of electric vehicles whizzing among the old American cars so emblematic of the Cuban capital.
Jun 18, 2022
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Engineering
Engineers still have some kinks to work out before flying taxis become reality. But when they do hit the market, what will demand look like at different times and places? That's one question Suchithra Rajendran and Sharan ...
Oct 13, 2021
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Hi Tech & Innovation
Google's penchant for giving us answers, in its new era of AI, is a gift that keeps on giving. A new item in Google's gift bag: extra trimmings on Google Flights.
Robotics
Engineers at Duke University have developed an electronics-free, entirely soft robot shaped like a dragonfly that can skim across water and react to environmental conditions such as pH, temperature or the presence of oil. ...
Mar 25, 2021
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Engineering
The ocean isn't just impacted by climate change—it may also be part of the solution to reversing it.
Jul 24, 2023
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Portugese airline TAP said Thursday it would cut roughly 1,000 flights in March and April as it seeks to adjust to a drop in demand due to the spread of the new coronavirus.
Mar 5, 2020
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The Earth's atmosphere is a layer of gases surrounding the planet Earth that is retained by the Earth's gravity. It has a mass of about five quadrillion metric tons. Dry air contains roughly (by volume) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, and trace amounts of other gases. Air also contains a variable amount of water vapor, on average around 1%. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night.
There is no definite boundary between the atmosphere and outer space. It slowly becomes thinner and fades into space. An altitude of 120 km (75 mi) marks the boundary where atmospheric effects become noticeable during atmospheric reentry. The Kármán line, at 100 km (62 mi), is also frequently regarded as the boundary between atmosphere and outer space. Three quarters of the atmosphere's mass is within 11 km (6.8 mi; 36,000 ft) of the surface.
This text uses material from Wikipedia, licensed under CC BY-SA
