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Gravity's Oldest Puzzles
Every now and then the orbital motion of a body doesn’t match our prediction. And that might lead to interesting discoveries.
New
The latest blog posts to take off on Hacker News. 147 posts.
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Apes may be closer to speaking than many scientists think
Koko the gorilla is best known for a lifelong study to teach her a silent form of communication, American Sign Language. But some of the simple sounds she has learned may change the perception that humans are the only primates with the capacity for speech.
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Why the Greenwich meridian moved
Walk about 100 meters east of the Observatory's meridian line. Slow down to a crawl as your GPS approaches 0 degrees, 0 minutes, 0 seconds longitude. There's no sign and no line on the ground.
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World's first white laser
Researchers at ASU have proven that semiconductor lasers are capable of emitting over the full visible color spectrum, which is necessary to produce a white laser.
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A Short Course in Thinking About Thinking (2007)
A SHORT COURSE IN THINKING ABOUT THINKING Edge Master Class '07 DANIEL KAHNEMAN Auberge du Soleil, Rutherford, CA, July 20-22, 2007 AN EDGE SPECIAL PROJECT
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Ocean acidification may cause dramatic changes to phytoplankton
A new study finds that increased ocean acidification will dramatically affect global populations of phytoplankton: Some species will die out, while others will flourish, which will affect marine food webs.
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Spraying Magnetic Stripe Cards with Iron Filings
Posted by anaglyph under DIY , Gadgets , Hokum , Science , Skeptical Thinking , WooWoo [80] Comments
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Intellectual pursuits may buffer the brain against addiction
Mice engaged in stimulating activities were less likely to seek out cocaine
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Will Our Understanding of Math Deteriorate Over Time?
Scientific American writes about rescuing the enormous theorem (classification of finite simple groups) before the proof vanishes. How can...
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Homemade Memristor (2011)
Modified curve tracer is applying AC voltage. Horizontal axis represents voltage and the vertical axis represents current. In both cases, the curve always passes through zero voltage and current. This requirement must be met in order to be classified as a memristor.
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CRISPR Gene Editing
CRISPR is a recently discovered genomic tool that could potentially revolutionize genetic modification and editing, including gene silencing, editing, activating, and other crucial functions. It has made a big splash in the synthetic biology community, and mentions of CRISPR have started cropping up elsewhere in the…
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New Horizons enters safe mode 10 days before Pluto flyby
New Horizons decided to put on a little 4th of July drama for the mission's fans. It's currently in safe mode, and it will likely be a day or two before…
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Physical Intuition, Not Mathematics (2011)
“What we call Man's power over Nature turns out to be a power exercised by some men over other men with Nature as its instrument.”
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Photos from inside the Baikonur Cosmodrome
Нельзя заходить в спальню к богу, Даже если его там нет. Нельзя заходить в спальню к богу, За дверью большой секрет - Ундервуд. Буквально вчера, 02 июня 2015 года, исполнилось 60 лет колыбели мировой космонавтики и крупнейшей отечественной космической гавани - космодрому Байконур. За эти годы…
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Could dark matter not exist?
Is it possible that our problems indicate a flaw in the theory of gravity?
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Bayes’ Theorem – What is it and what is it good for?
Bayes’ Theorem tells us how to rationally assess the probability of a certain statement of interest being true, given some evidence. Insofar as science consists in creating hypotheses, collecting e…
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Top mathematical achievements of the last 5ish years, maybe
I have recently been going through my book Maths 1001 making updates for a forthcoming foreign edition (of which more in future). So I have been looking over mathematical developments since approxi…
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Clifford Algebra: A visual introduction (2014)
Clifford Algebra, a.k.a. Geometric Algebra, is a most extraordinary synergistic confluence of a diverse range of specialized mathematical fields, each with its own methods and formalisms, all of wh…