Science
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Helioviewer
An open-source viewer for exploring the Sun in near real time, layering imagery from solar observatories to watch flares…
HeliStart
A portal for helicopter enthusiasts covering rotorcraft, simulators, experimental and kit-built helicopters, manufacture…
Hengefinder: Finding When the Sun Aligns With Your Street
A blog post on building a tool that predicts the days when the setting sun lines up with any street, like Manhattanhenge…
Henley Spiers Photography
Award-winning underwater photography by Henley Spiers, with galleries of big scenes, tiny creatures and black and white…
Herb's Astronomy Stuff
A retired amateur astronomer's page of telescopes, optics and homemade gear from his active 1990s observing days, shown…
Here Is Today
A minimalist interactive page about time, built to make you stop and reflect on where today sits within the bigger pictu…
Here Is Today
An interactive that starts with today and zooms out step by step through the year, the century and the age of Earth to s…
Here's to the Next 100 Sudokus
A data-driven personal essay in which a puzzle lover logs every move in 100 sudokus and visualizes the surprising patter…
Herkimer Stardust
A personal collection site showing twenty years of hand-dug Herkimer diamonds, the clear quartz crystals once stashed in…
Hermit-Crabs.com
A practical land hermit crab care guide for new owners, covering habitat, diet, shells and keeping these exotic pets hea…
Heroic Relics
An archive of technical information on spacecraft from the heroic age of manned spaceflight, collecting documents and de…
Hey JTree
Dating-app style profiles for individual Joshua trees in the Mojave Desert, inviting you to find a more-than-human roman…
HeyWhatsThat
Computes what you can see from any point on Earth, drawing a panorama and a visibility map of the mountain summits in vi…
HHMI BioInteractive
Free films, animations, and interactive lessons about biology from the Howard Hughes Medical Institute, including stunni…
Higher Category Theory And Physics
An nLab wiki entry that surveys how higher category theory is used in physics, with links into the wider collaborative m…
Higher Math Proficiency Test
A free, interactive 20-question quiz that evaluates the range of skills needed to tackle higher mathematics, handy for c…
Hilary: the most poisoned baby name
A statistician digs into Social Security baby name data to show how the name Hilary crashed in popularity after 1992 fas…
Hi-Phi Nation
A story-driven podcast where philosophy and reality meet, with several seasons of episodes that use real-life narratives…
HiRISE
High-resolution orbital imagery of the Martian surface from the HiRISE camera, revealing craters, dunes, and ancient geo…
Hiroshima Archive
A digital 3D globe archive of the Hiroshima atomic bombing, mapping survivor testimonies and photographs onto the city w…
Histology Guide
A virtual microscopy laboratory from the University of Minnesota that teaches how to recognize cell and tissue structure…
HistologyGuide
A free virtual microscope letting anyone pan and zoom across real stained tissue slides to learn how organs look under t…
Historical Tech Tree
An interactive visualization of technological history laid out as a tech tree, showing how inventions from ancient tools…
Historical Temperature
A data tool for looking up temperature changes over past decades in cities around the world, with trend charts and clima…
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