This interpretive overview separates a fixed orb, a tensioned triangle, and a portable capture net. The guides below pair explanatory artwork with credited field photographs and direct scientific sources.
SPIDERS, SILK, AND SCIENCE
Read in order for a biology-to-physics learning path, or start with the question that interests you. The articles pair real photographs with explanatory illustrations, source references, and videos with observation notes.
A clear field-guide overview of spider body plan, vibration sensing, predatory diets, and the many non-web uses of silk—written for WebTug readers.
READ GUIDE →02 · DEVELOPMENT + HABITATSpider life cycle and habitatHow spiders develop from egg sac to adult, why molting matters, how ballooning works as dispersal, and why habitat is an engineering constraint on silk strategy.
READ GUIDE →03 · FIELD PROFILESSix silk strategiesField profiles for Shamrock orb-weaver, triangle weaver, ogre-faced net-caster, bolas spider, western black widow, and Adanson’s house jumper—real silk use versus game visuals.
READ GUIDE →04 · MATERIALS SCIENCESpider silk as a materialHow spidroins become fibers in the spinning duct, why toughness is not the same as strength, a silk-systems table, and careful steel-comparison caveats.
READ GUIDE →05 · ARCHITECTUREWeb architectures as machinesHow orb, triangle slingshot, casting net, bolas, gumfoot, and dragline architectures route force—geometry and pretension as much as fiber chemistry.
READ GUIDE →06 · SCIENCE + PLAYPhysics teaching vs the gameKinetic energy, stress and strain, spring energy, and pendulum analogies—plus the exact fixed accelerations WebTug uses and how they differ from biology.
READ GUIDE →FROM WEBTUG’S OWN GAME MODEL
WHAT WE TESTED, AND WHAT WE FOUND
How much can a constrained course still vary? Why can a small input delay change a run? These two WebTug investigations publish their measurements, methods, and limits so you can check the answers yourself.
Large moves remain in the constrained course.
- Generated transitions
- 20,000
- Large moves
- 36.675%
7,335 moves exceeded 65% of the configured maximum. The protected continuation rule applied 2,029 times, with 0 violations in this seeded portrait test.
This checks the course generator, not whether every player can recover from every position.
Read the test, method, and raw dataThe same height can hide very different outcomes.
- Immediate correction
- 2 gaps
- Wait 0.100 seconds
- 0 gaps
Both scripted runs start at the same height and downward speed. The early correction clears both openings; the delayed correction collides at 0.350 seconds. Inspect each frame to see the difference develop.
This is one selected simulation using Classic’s rules, not a human trial or a universal reaction-time limit.
Inspect both replays and the input timingsThese results describe WebTug Classic. For real spiders and silk, explore the source-linked science guides; the science-to-game comparison explains where the models differ.
14 ORIGINAL SCIENCE MINUTES
One minute, one concept, one question to investigate. These WebTug videos pair original animated diagrams with credited still photographs, readable on-screen explanations, full transcripts, scientific sources, and 0.5×, 1×, 1.5×, and 2× playback. They have no audio narration and load only when you choose to watch.
- Read a spider's body1:00 · Locate the two body regions, distinguish legs from pedipalps, and separate visible features from assumptions.
- From egg sac to adult1:00 · Follow spider development through emerging young and juvenile molts, then identify what a photograph can actually establish.
- A web needs a place1:00 · Read habitat as supports, weather exposure, prey routes, and shelter, then make a short observation without disturbing a web.
- From liquid protein to silk1:00 · Trace silk from abdominal glands through ducts and spinnerets, and distinguish photographed outlets from an internal schematic.
- Strength, stretch, and toughness1:00 · Read stress and strain, then distinguish peak stress from the energy represented by a schematic curve's area.
- Double speed, quadruple energy1:00 · Calculate an illustrative insect-sized impact, then change one control in the orb model to test a prediction.
- Know which model you are using1:00 · Separate Classic's fixed movement, six science challenges, and Lab demonstrations before interpreting a result.
- Build with underwater silk1:00 · Meet case-making caddisfly larvae, distinguish adhesion from fiber response, and compare one model shelter in two currents.
- Orb webs: stopping an impact1:00 · Trace impact energy through an orb, distinguish stopping from sticking, and compare rebound in the lab.
- Triangle webs: energy before impact1:00 · Follow a triangle weaver's loading and release sequence, then test how preload changes the lab's starting extension.
- Net casting: move the capture surface1:00 · Connect a handheld capture mesh with visual hunting, then isolate net stretch in a schematic comparison.
- Bolas: lure, flick, and adhere1:00 · See how chemical attraction, active movement, and deformable glue combine, then test a passive pendulum analogy.
- Gumfoot: a trap that releases1:00 · Locate the release point and the stored energy in a cobweb system, then compare the lab's settling motion.
- Draglines: control after takeoff1:00 · Distinguish observed jump stabilization from the lab's vertical fall analogy, then test the response after a line becomes taut.
MORE TO OBSERVE: PUBLISHER FILMS
For real behavior in motion, these links lead to the optional publisher films below the matching science minute. Open “Watch the original publisher’s film for more detail.” Each film retains its publisher, species notes, and observation prompts.
- Beautiful Spider Web Build Time-lapse · 4:36
BBC Earth - Catapulting spider winds up web to launch at prey: study · 0:37
AFP News Agency · research footage - Ogre-faced, net-casting spiders catch prey in dark of night · 2:42
Cornell University · Jay Stafstrom - Bolas Spider · 1:06
Content Mint / Absolutely Wild Visuals - Why the Male Black Widow is a Real Home Wrecker · 5:49
KQED / PBS Deep Look - This Jumping Spider Trains Itself to Kill · 4:47
KQED / PBS Deep Look - Watch This Tarantula Crawl Out of Its Own Skeleton · 1:11
National Geographic - 20 MILLION Year-Old Spider and the Science of Spider Silk · 7:44
PBS Be Smart · Cheryl Hayashi - Turret Spiders Launch Sneak Attacks From Tiny Towers · 4:35
KQED / PBS Deep Look
THREE WAYS TO EXPLORE
Start with reading a photograph. Find the two body regions, then compare a real spinneret close-up with the anatomy illustration. Finish with egg sacs, spiderlings, and a molt.
Read the worked fiber calculation, watch the silk researcher’s explanation, and trace an orb’s force paths. In the lab, change one input at a time and describe what changes.
Compare the six photographed spiders and hunting films with their lab modes. Then read the science-to-game comparison before trying the one-button arcade model.
START WITH THE PROBLEM YOU WANT TO SOLVE
The quickest path is the visual lesson if the spider keeps dropping after tiny taps. Use the physics guide when you want exact numbers, the fairness report when a gap sequence looks suspicious, and troubleshooting when an input or saved score behaves differently than expected.
Choose Classic, a spider challenge, or River Shelter. Follow the controls with captions, chapter shortcuts, and four playback speeds.
READ GUIDE →MEASURED MOVEMENTWhat one web hold doesFollow acceleration, speed limits, visible web travel, and two worked timing examples.
READ GUIDE →INTERACTIVE SCIENCESix ways spiders turn silk into a machineCompare impact absorption, elastic release, a casting net, a bolas, a gumfoot spring, and a stabilizing dragline.
READ GUIDE →20,000-PAIR TESTHow the forest stays reachableInspect the generator constraints, portrait test method, results, and limitations.
READ GUIDE →SCENARIO PLAYBOOKRead two openings aheadChoose a response for low entry, fast fall, high rise, reversals, and emergency recovery.
READ GUIDE →RULES & MILESTONESEvery point and medal explainedUnderstand scoring, the exact 10/20/30/40 thresholds, local bests, and challenge links.
READ GUIDE →PHONE & TABLETPortrait, landscape, and touchCompare usable space, hand position, browser chrome, keyboard controls, and rotation.
READ GUIDE →DEVICE HELPFix input, audio, score, or display issuesRun short checks without clearing data first, then learn what information helps diagnose a problem.
READ GUIDE →FIRST-HAND HISTORYDevelopment notesSee dated changes to reachability, challenge links, visual polish, and the learning library.
READ GUIDE →WHAT THESE GUIDES CAN—AND CANNOT—PROMISE
The explanations describe the current WebTug build and are revised when the underlying behavior changes. They can explain why an input tends to produce a path, but they cannot give one perfect beat: the next opening and the spider’s entry velocity both vary. That uncertainty is the game.
The Spider Physics Lab is deliberately separate. Its comparative models demonstrate real silk uses with stated simplifications; changing them never changes the arcade movement, collision box, score, body motion, or shared web-travel time.