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Why is 70% isopropyl alcohol a better disinfectant than 99% isopropanol?
How does one solution kill viruses and bacteria on contact, and the other not at all?
New
The latest blog posts to take off on Hacker News. 4,456 posts.
2642
DIY Particle Detector
Discover how to create a DIY particle detector using silicon photodiodes, the same technology employed in professional particle and nuclear physics experiments.
2643
Solar’s Future is Insanely Cheap
This is part 1 of a series where I’ll look at the future costs of clean energy and mobility technologies.
2644
A Short History of Color Theory
Programming Design Systems is a free digital book that teaches a practical introduction to the new foundations of graphic design.
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Age Reduction Breakthrough?
If you eschew hyperbole and hang in for the long haul, maintaining a discipline of understatement in the midst of a flashy neon world, you may be offered a modicum of credence when you make an extraordinary announcement.
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Coronavirus (COVID-19) Testing
Explore data on COVID-19 testing across the world.
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Recovering Iran’s NOUR 01 ‘Military Satellite’
Iran’s new military satellite, NOUR 01, most interesting fact may not be that it resembles a college engineering experiment but rather that it may have a connection to a Mexican military payl…
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Power Bends Light (2019)
Some notes about acquiring power that I wish I'd understood years ago.
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There is one, and only one strain of SARS-CoV-2
The moment a preprint emerges describing a new patient isolate of SARS-CoV-2, with a change in the genome sequence, the world seems to explode with concern ...
2654
The Baloney Detection Kit: Carl Sagan’s Rules for Critical Thinking
Necessary cognitive fortification against propaganda, pseudoscience, and general falsehood.
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A brief introduction to the beauty of Information Theory
Lambdaclass's blog about distributed systems, machine learning, compilers, operating systems, security and cryptography.
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ESO Instrument Finds Closest Black Hole to Earth
A team of astronomers from the European Southern Observatory (ESO) and other institutes has discovered a black hole lying just 1000 light-years from Earth. The black hole is closer to our Solar System than any other found to date and forms part of a triple system that can be seen with the naked eye. The team found…
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A young Venus had water for 2B years, habitable for longer than Mars
Venus hosts brutal conditions today, but the planet may have once been more hospitable to life.
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What Happens Next? Covid-19 Futures, Explained with Playable Simulations
an interactive guide
2660
There are many SARS-CoV-2 strains with gene deletions
In my first post on a possible solution to COVID-19 I hypothesised that there would be gene deletion mutants to be found in the SARS-CoV-2 viral strains out in the world and that we would find them if we looked.
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Lab-made? CoV2 genealogy through the lens of gain-of-function research
Virologists have created dozens of chimeric coronaviruses in the lab over the past 20 years.
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How much power can we expect from rainfall?
Can the teardrops that fall after reading bad science writing generate renewable electricity? Yes, they can. 1. The puzzle of power from raindrops The usually excellent Marginal Revolution blog fea…
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UChicago doctors see ‘remarkable’ success using ventilator alternatives
The page you requested could not be found. Here are some suggestions to help you get back on track.
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Gravity assist maneuvers in space
Ingenious maneuvers by missions to go over the Sun, chase a comet and sail using the Sun.
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Adult immune systems ‘remember’ germs to which they’ve never been exposed (2013)
A new study shows that, contrary to established dogma, key immune cells in healthy adults somehow acquire "memory" of microbes that have never entered their bodies.
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An un-edited view of Saturn
Something that is kind of annoying about NASA photos is that they end up so touched up, and so many liberties taken with them that they become creatures of their own.
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Concerns with that Stanford antibody study of coronavirus prevalence
I’ve been following your blog for a while and checked in today to see if there was a thread on last week’s big-splash Stanford antibody study (the one with the shocking headline that they got 50 positive results in a “random” sample of 3330 antibody tests, suggesting that nearly 2% of the population has been infected…
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