Your lab notebook
Cases solved, things discovered and guesses made, kept in this browser only. Nothing is sent anywhere, so use Save below to move it to another device.
Your rank
Lab Visitor
0 XP · 30 more for Lab Assistant
0/25
cases solved
0/31
discoveries
0/6
expeditions
Prediction skill
Before each run you can guess whether your setup will reach the goal. The more honestly you guess, the better the score.
Today’s case
Expeditions
Short trails of cases that build one idea. Finish one for a summary of what you learned.
Why traffic jams
0/5Buses that clump, cars that weave, and a road that slows without a cause.
Waiting at the lights
0/4Amber, arrows and queues: what makes a junction flow.
Momentum and energy
0/4Carts, a cradle and a truck: what is kept in a collision, and what is not.
Balance and habits
0/4A meadow that can crash, and a habit that can be broken.
Money and prices
0/4Four neighbours and a bank: who is squeezed when prices rise.
All cases
Traffic Ring
Phantom Jam
Green Light
How Smoking Hooks the Brain
How Rumours Travel
Inflation
Collision Lab
- Stop deadThe first cart ends up standing still☆☆
- Where did the energy go?At least 45% of the movement energy is lost☆☆
- Rebuild the cradleResearch case · The last ball leaves at at least 3.5 m/s (the first arrives at 4)☆☆
- Truck against carResearch case · The biggest average load on either vehicle is no more than 15 g☆☆
Discoveries
Found by playing, in or out of a case. Each one is something the simulation actually did.
Traffic Ring
? ? ?
Clue: What if nothing ever delayed a bus?
Traffic Ring
? ? ?
Clue: Let the buses drift for a while.
Traffic Ring
? ? ?
Clue: Look at the longest wait for a bus.
Phantom Jam
? ? ?
Clue: Pack the road and watch.
Phantom Jam
? ? ?
Clue: Press “Hit the brakes”.
Phantom Jam
? ? ?
Clue: Fill the road.
Phantom Jam
? ? ?
Clue: Let cars join from the ramp.
Green Light
? ? ?
Clue: Watch the last car in the queue.
Green Light
? ? ?
Clue: What if the amber is short?
Green Light
? ? ?
Clue: Bring in lots of traffic.
Predators & Prey
? ? ?
Clue: Start with plenty of rabbits and few foxes.
Predators & Prey
? ? ?
Clue: Let the rabbits eat.
Predators & Prey
? ? ?
Clue: Wait for the rabbits to run low.
Predators & Prey
? ? ?
Clue: Close the meadow, and be patient.
How Smoking Hooks the Brain
? ? ?
Clue: Let the habit run.
How Smoking Hooks the Brain
? ? ?
Clue: Try to quit.
How Smoking Hooks the Brain
? ? ?
Clue: Help them get through the first weeks.
How Smoking Hooks the Brain
? ? ?
Clue: What if nobody around smoked?
How Rumours Travel
? ? ?
Clue: Let the story change as it travels.
How Rumours Travel
? ? ?
Clue: What if everyone repeated it?
How Rumours Travel
? ? ?
Clue: Cross the town.
How Rumours Travel
? ? ?
Clue: Watch which version is told most.
Inflation
? ? ?
Clue: Let high inflation run for years.
Inflation
? ? ?
Clue: Look at what the savings buy.
Inflation
? ? ?
Clue: What if money grows slowly but expectations are firm?
Inflation
? ? ?
Clue: Turn the central bank on.
Collision Lab
? ? ?
Clue: Equal masses, bouncy.
Collision Lab
? ? ?
Clue: A light body against a heavy one.
Collision Lab
? ? ?
Clue: Make them stick.
Collision Lab
? ? ?
Clue: Cars, with a short crash.
Collision Lab
? ? ?
Clue: Put them in a box.
How ranks work
A solved case is worth 20 XP and its stretch goal 10 more. A discovery is worth 15, a finished expedition 50, a daily case 10 extra, and each prediction 2 (up to 50). Nothing expires and nothing is taken away.
Lab Visitor 0 · Lab Assistant 30 · Junior Technician 100 · Technician 220 · Researcher 400 · Senior Researcher 650 · Lead Investigator 950 · Principal Investigator 1300