Science
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Olaf Otto Becker
Landscape photographer Olaf Otto Becker presents his long-term projects, including vast large-format images of Greenland…
Olaf: Acoustic Fingerprinting on ESP32 and in the Browser
A write-up of Olaf, an acoustic fingerprinting system that identifies audio on a tiny ESP32 microcontroller and also run…
Old vs. New Growth Trees and the Wood Products They Make
A millwork shop explains how old-growth and new-growth timber differ in grain, strength and stability, and why that matt…
Old-Growth Forest Network
A project mapping and protecting America's remaining old-growth forests, with a searchable directory of publicly accessi…
Oliver Byrne's Euclid
A look at Oliver Byrne's 1847 edition of Euclid, which replaced letters with bold red, yellow and blue shapes and became…
Oliver Heaviside and the Theory of Transmission Lines
A clear technical note on how Heaviside reshaped electrical signaling theory, explaining waves, impedance and distortion…
Olivier Cleynen
Olivier Cleynen's free lecture notes and books on fluid mechanics and thermodynamics, with clear illustrations, along wi…
Ologies with Alie Ward
The episode archive of Ologies, a free comedy-science podcast in which Alie Ward asks experts in obscure fields, from ba…
Omega Naught Labs
David Kronstein's engineering playground, documenting homemade high-speed cameras, coilguns, motors and other ambitious…
OMG Space
A graphic design thesis that shows the Sun, planets, and dwarf planets to scale in one scroll of over 19 million pixels,…
Omni Calculator
A collection of more than 3,000 free calculators built with subject experts, covering everything from mortgage payments…
On Biology
BMC's blog of insight and opinion on the latest biology research and developments, with short pieces that translate new…
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On Geek Versus Nerd
A machine-learning researcher uses Twitter data to chart which words lean geek and which lean nerd, with a scatter plot…
On The Fuel Efficiency of Launching My Enemies Into The Sun
A playful orbital-mechanics essay that works out, with real equations and footnoted jokes, why launching something into…
On the Trail of the Glaciers
A photographic expedition project that retakes century-old glacier photos from the same viewpoints, so you can compare t…
On Verticality
A blog exploring the human urge to escape the ground, mixing architecture, aeronautics, towers, flight and evolutionary…
Once More, With Feeling
A scrolling, audio-on explorable from UC Berkeley that measures emotion in spoken film performances, playing real movie…
One Minute Focus
A guided one-minute exercise where you stare at a dot and breathe to settle your attention before a task. Works instantl…
One Revolution Per Minute
Erik Wernquist's short film showing a vision of rotating space stations with artificial gravity, rendered in lovely cine…
OneSoil Map
An interactive map of AI-detected crop fields across Europe and the USA that lets you explore and compare what is grown…
OneZoom
An interactive fractal tree of life letting you zoom through the evolutionary relationships of more than two million liv…
Online Experiment on Dogmatic Thinking
A web experiment adapted from a 2020 study that tests a cognitive quirk linked to dogmatic worldviews, with a write-up o…
Online Mathematics Textbooks
A long-running curated list of free online mathematics textbooks, from calculus and linear algebra to abstract algebra,…
Online Tone Generator
A simple, precise online tone generator for testing hearing, tuning instruments, and exploring frequencies from 1 Hz to…
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