Science
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Diffractive Chocolate
Instructions and the science behind chocolate with a microscopic grating that splits light into rainbow colors, from the…
Digital Giza
Harvard's open catalog of the Giza pyramids, with excavation photos, expedition diaries, 3D reconstructions of tombs and…
Digital Giza: Inside the Great Pyramid
A 3D guided tour that takes you inside the Great Pyramid of Khufu, with chambers, passages and the history of its constr…
digital humus
A slow, nature-minded personal site of experiments and thoughts, with a Sauntering section about nature walks, small pro…
Digitalfire
Tony Hansen's ad-free ceramics reference library explaining glaze chemistry, clay bodies, and firing troubleshooting in…
Dino Directory
The Natural History Museum London's illustrated directory profiling more than 300 dinosaur species with facts, sizes, an…
Dirkon - The Paper Camera
Plans and photos of the Dirkon, a working pinhole camera you cut and fold out of paper that takes real 35mm film, plus s…
Discover Life
A massive identification and mapping tool covering hundreds of thousands of species, built by researchers as a free glob…
Discover Magazine
A science magazine with entertaining, thought-provoking coverage that turns curiosity into understanding through expert…
Discover Wildlife
BBC Wildlife Magazine's website featuring animal facts, live webcam roundups, and nature photography from across the UK…
Discrete Mathematics: An Open Introduction
A free, open-licensed college textbook on discrete math with online reading, PDF download, exercises and interactive exa…
silentlistening.wordpress.com
Audio
Dispersion of Sound Waves in Ice Sheets
A field recording of a frozen lake near Berlin, where cracking ice sheets make strange laser-like pew sounds, with an ex…
Distance to Mars
If Earth were 100 pixels wide, how far away would Mars be? Scroll sideways through an enormous empty page to feel the re…
Distill
A machine learning research journal that published interactive, visually rich explanations of neural networks and their…
distillatio.wordpress.com
Website
distillatio
A blog about medieval and Tudor alchemy and chemical technology, digging recipes for distillation, sealing vessels and s…
Divergent Association Task
A quick creativity test where you name ten words as different from each other as possible, then get a score based on how…
DiveZone
A scuba diving blog with underwater photography and video, dive site guides, and nature and conservation news for divers…
Diving Gallery
A scuba diving photo gallery that sorts underwater pictures by timeline, common name and taxonomy, from anemones to nudi…
DIY Air Purification Designs
Build notes for the cheap DIY box-fan air purifier made from furnace filters, with step-by-step instructions, measured p…
DIY Computer with 7400 Series TTL
A hobbyist's long build log of designing and wiring a working CPU from 7400 series TTL logic chips, with schematics, boa…
Dmitry Kokh
Underwater and wildlife photography by Dmitry Kokh, including polar bears exploring an abandoned Arctic weather station,…
DNA is Just Part
A photo gallery of portraits of creatures built from the DNA sequences of those same creatures, an art-meets-genetics se…
DNA Learning Center
Cold Spring Harbor Laboratory's genetics education site with animations and interactive activities explaining DNA, hered…
Do dentists actually know what they're doing?
A curious, readable dig into how much of routine dentistry is backed by strong evidence, from cavities to fluoride and c…
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