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Topics /
Science & Space
The most popular blog posts about science & space on Hacker News. 440 posts.
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Tumor-destroying sound waves receive FDA approval for liver treatment in humans
The U.S. Food and Drug Administration has approved the use of sound waves to break down tumors—a technique called histotripsy—in humans for liver treatment.
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What is a zero refractive index material?
I’m currently writing a textbook on Electromagnetic Waves for my graduate optics students. I was reading up on zero refractive index materials for a chapter section and thought it would be fu…
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MIT engineers create an energy-storing supercapacitor from ancient materials
MIT engineers created a carbon-cement supercapacitor that can store large amounts of energy. Made of just cement, water, and carbon black, the device could form the basis for inexpensive systems that store intermittently renewable energy, such as solar or wind energy.
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How we plan to de-extinct the Dodo bird
Join us in witnessing the legendary dodo's resurrection. Explore scientific breakthroughs, conservation efforts, and the ethical implications.
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Full ignition for ESA’s reusable rocket engine
Work to develop a reusable engine for European rockets is progressing, with full ignition of an early prototype of Prometheus. These images were taken on 22 June 2023 at ArianeGroup’s test facility in Vernon, France during a 12-second burn.
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“Internet in space” will transform the satellite imagery industry
(First, Some Background)
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Symmetry in Chaos
The following is based upon systems of equations found in "Symmetry in Chaos, A Search for Pattern in Mathematics, Art, and Nature" (the second edition) by Michael Field and Martin Golubitsky. They ask the question whether there are aperiodic chaotic attractors that generate symmetric patterns? Can there be order…
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The falling nutritional value of crops
The mineral content of wheat and rice is lower today than sixty years ago. Why is that and what does it mean for how we eat?
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How bioelectricity could regrow limbs and organs
Biologist’s innovative research on how cells rebuild themselves could be the future of regenerative medicine
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Exercise increases number of immune cells in cancer patients
Two new Finnish studies show that short bouts of light or moderate exercise can increase the number of immune cells in the bloodstream of cancer patients.
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Low-cost open source device can measure air pollution anywhere
Flatburn is an open-source, mobile pollution detector from the MIT Senseable City Lab intended to let people measure air quality cheaply.
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A CD Spectrometer (2006)
A simple spectrometer can be built from a CD and a box. Cut a slit on one side of the box. Place the CD on the other side with about 60 degree angle. Look down into the openning on the box. The slit should not be too wide, otherwise the spectrum lines will be blurred. It should not be too narrow either, otherwise the…
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Leonardo da Vinci’s experiments explored gravity as a form of acceleration
A new look at da Vinci’s papers reveals his insightful attempts to probe the nature of gravity 500 years ago
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Could we stop Yellowstone from erupting with a giant geothermal power plant?
It’s become fairly common knowledge that Yellowstone National Park, in addition to being incredibly beautiful, is sitting on top of an enormous supervolcano that catastrophically erupts every few hundred thousand years.
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Birds make nests out of anti-bird pins
Biologists present the latest innovation in nest building: bird nests made from anti-nesting spikes.
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Juice’s RIME antenna successfully unjammed
More than three weeks after efforts began to deploy Juice’s ice-penetrating Radar for Icy Moon Exploration (RIME) antenna, the 16-metre-long boom has finally escaped its mounting bracket.
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Feynman’s Maze-Running Story
Richard Feynman recounts an amazing anecdote about philosophy of science; we trace it to a forgotten University of Michigan research programme into ‘floor cues’.
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New antifungal therapy for fungal meningitis
A team of University of Minnesota Medical School researchers successfully tested a new antifungal therapy to treat fungal meningitis. The trial results were published today in the peer-reviewed journal Clinical Infectious Diseases.
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SpaceX's Texas Rocket Is Going to Cause a Lot More Damage Than Anyone Thinks
On Friday, the Federal Aviation Administration issued a license for SpaceX to launch the first orbital test of Starship, the largest rocket in human history, as soon as this Monday, April 17th.
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Shutting down nuclear power could increase air pollution: study
An MIT study shows that if U.S. nuclear power plants are retired, the burning of coal, oil, and natural gas to fill the energy gap could cause more than 5,000 premature deaths.
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Carl Sagan's Rules for Bullshit-Busting and Critical Thinking
Necessary cognitive fortification against propaganda, pseudoscience, and general falsehood.
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Coffee grounds make concrete 30% stronger
Engineers in Australia have found a way of making stronger concrete with roasted used-coffee grounds, to give the drink-additive a “double shot” at life.
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Farms that create habitat key to food security and biodiversity
Diversified farming is an important complement to forest protections for reversing tropical biodiversity declines.
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The Effects of Noise on Health (2022)
As you were browsing something about your browser made us think you were a bot. There are a few reasons this might happen:
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Printed robots with bones, ligaments, and tendons
For the first time, researchers have succeeded in printing a robotic hand with bones, ligaments and tendons made of different polymers using a new laser scanning technique.