Security
As malicious actors become more adept in their attempts to circumvent international nuclear nonproliferation safeguards, the United States government has invested in research to better detect bad actors' malign activities. ...
Nov 3, 2022
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Robotics
Scientific progress is anything but automatic. The path to new discoveries is not a straight line. But while the route to nuclear energy breakthroughs may be circuitous, automated solutions can enhance the efficiency of the ...
Nov 1, 2022
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Energy & Green Tech
Did you know that many countries still rely on paper-based systems to keep track of transactions involving nuclear material?
Oct 31, 2022
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Business
In recent years, cafes, supermarkets and online shops have started to trial drone delivery in a handful of locations around the world. More than a dozen drone delivery companies are now running such trials.
Oct 27, 2022
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Energy & Green Tech
If the transition to renewables is to succeed, we will need a viable means of storing surplus heat and electricity. Globe spoke to experts from ETH Zurich about the promising technologies that could help us reach net zero.
Oct 14, 2022
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Energy & Green Tech
After over a decade of delays, the deafening sound of Finland's new Olkiluoto 3 nuclear reactor finally running its turbine at full power was welcomed with joy—and relief.
Oct 13, 2022
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22
Energy & Green Tech
Climate change risks undermining global energy security unless the use of renewables is dramatically scaled up, the UN warned Tuesday, suggesting the Ukraine conflict's ripple effects could speed up the green transition.
Oct 11, 2022
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Engineering
With no-wind-turbine signs on roadsides next to cornfields, it's hardly surprising that land use is a thorny issue for renewables. But how much land do different zero-carbon technologies really use?
Oct 6, 2022
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Energy & Green Tech
A nuclear power plant produces 8000 times more power than fossil fuels and is environmentally friendly, but when accidents do occur, they have major repercussions, such as the 1986 Chernobyl disaster. Nearly 100 people died ...
Oct 5, 2022
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384
Energy & Green Tech
To quit coal and move to renewables, we need large-scale energy storage. That's where pumped hydro comes in. Queensland's ambitious new plan involves shifting from a coal-dominated electricity grid to 80% renewables within ...
Oct 4, 2022
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A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission or a combination of fission and fusion. Both reactions release vast quantities of energy from relatively small amounts of matter; a modern thermonuclear weapon weighing little more than a thousand kilograms can produce an explosion comparable to the detonation of more than a billion kilograms of conventional high explosive. Even small nuclear devices can devastate a city. Nuclear weapons are considered weapons of mass destruction, and their use and control has been a major aspect of international policy since their debut.
In the history of warfare, only two nuclear weapons have been detonated offensively, both near the end of World War II. The first was detonated on the morning of 6 August 1945, when the United States dropped a uranium gun-type device code-named "Little Boy" on the Japanese city of Hiroshima. The second was detonated three days later when the United States dropped a plutonium implosion-type device code-named "Fat Man" on the city of Nagasaki, Japan. These bombings resulted in the immediate deaths of around 120,000 people (mostly civilians) from injuries sustained from the explosion and acute radiation sickness, and even more deaths from long-term effects of ionizing radiation. The use of these weapons was and remains controversial. (See atomic bombings of Hiroshima and Nagasaki for a full discussion.)
Since the Hiroshima and Nagasaki bombings, nuclear weapons have been detonated on over two thousand occasions for testing purposes and demonstration purposes. The only countries known to have detonated nuclear weapons—and that acknowledge possessing such weapons—are (chronologically) the United States, the Soviet Union (succeeded as a nuclear power by Russia), the United Kingdom, France, the People's Republic of China, India, Pakistan, and North Korea. Israel is also widely believed to possess nuclear weapons, though it does not acknowledge having them. (For more information on these states' nuclear programs, as well as other states that formerly possessed nuclear weapons or are suspected of seeking nuclear weapons, see list of states with nuclear weapons.)
This text uses material from Wikipedia, licensed under CC BY-SA
