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Change one thing. Look a little closer.

Mystery Lab

40 experiments · 4 topics

Explore images, mechanisms, observations and reports. Choose what you would like to change and compare.

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Photographs & images

A straight blade looks bent: compare the times assigned to its rows

Keep a rigid two-blade bar’s motion fixed. Compare shared and staggered row times, then reverse only the sampling order.

What you can change or uncover

① Compare shared row times with top-to-bottom row times. ② Keep clockwise rotation fixed and compare top-to-bottom with bottom-to-top sampling. Check the outline and timing table together.

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Experiments to explore

Showing 10 of 40 experiments

Observation & interpretation

Matching Patterns, Additional Records

Reveal reception boxes beside matching patterns, then compare simultaneous records and two path conditions. Notice what information helps investigate an origin.

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Rumours & reporting

Does Adding a Speaker Label Add Evidence?

Attach a speaker label to an invented saying, then compare the information in an earlier note and a later card.

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Photographs & images

Open the space and time behind a single scene

Reveal a robot’s production space while its pose stays fixed. Then compare the moments before and after the shot with the captured image.

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Exhibits & mechanisms

Inspect the Drawings, Then Change Their Interval

Inspect eight original ball drawings individually, then compare their unchanged sequence at two intervals. Check what changes and what stays fixed.

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Observation & interpretation

The same road, different surrounding cues

Switch the surrounding cues, then reveal a level scale to inspect the lower end of the model.

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Rumours & reporting

Does “Visible” Mean the Same Conditions?

Compare a fictional strip at two distances, then check whether a historical record’s location and equipment match two sentences.

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Photographs & images

What disappears in a crop, and stays constant in an enlargement?

Crop a view of an orange marker to remove its reference bar. Then enlarge the marker and reference together and compare their lengths.

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Exhibits & mechanisms

Moving Points, Nodes and the Places Grains Gather

Compare point heights at opposite moments, then check whether nodal lines and example grain arrangements occupy the same places in two shapes.

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Observation & interpretation

Compress one record, then overlap two direction bands

Compare 1× and 16× display times, then reveal the direction bands from two invented observation stations.

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Rumours & reporting

Is an Overall Fail and a Bare “6” Enough?

Reveal subject results in an invented examination, then attach institution, time and grading keys to two fictional records.

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Photographs & images

Where did the circle stay, and for how long?

Compare one-slot and eight-slot records. Then keep eight slots and pause the circle to examine the fraction spent at each position.

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Exhibits & mechanisms

The Starting Level and the Path That Keeps Flowing

Compare starting at water heights 40 and 80, then compare a continuous column and an air-broken path at the same height 40.

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Observation & interpretation

Compare one arm, its shadow and the Sun’s side

Inspect corresponding pose changes, then compare the front-mist display with the Sun behind and in front.

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Rumours & reporting

Did the Team Buying the Pen Also Fund Its Initial Development?

Change a fictional order and connect a second customer to compare initial development resources with product purchase payments.

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Photographs & images

Same grey centres: what changes when only the surrounds change?

Keep both circles’ RGB settings fixed. Change the right background, then cover and restore the different surrounds with the same neutral shade.

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Exhibits and devices

Turn the floor and compare the swing-direction line

Compare an outside view and a floor-frame view of a North-Pole model, then inspect three latitudes over the same quarter-turn of Earth.

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Observation and interpretation

The object stays still. Does the arrival direction stay the same?

Extend the direction of arriving curved light straight backwards. Then keep the object and eye fixed while comparing bending-omitted and curved explanatory paths.

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Rumours & reporting

30 and 20 Incidents—Out of How Many Journeys?

Keep fictional incident counts fixed and change journey totals. Compare what happens to the shares and their ranking with matching and different denominators.

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Photographs & images

A straight blade looks bent: compare the times assigned to its rows

Keep a rigid two-blade bar’s motion fixed. Compare shared and staggered row times, then reverse only the sampling order.

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Exhibits and devices

Can a long ring project as a circle from low down?

Project one floor ring from two directions, then fix a 30° view and compare a circle with a stretched ring.

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Observation and interpretation

The air passes through. Why can the cloud seem fixed?

Move the same air marker to three positions and compare the cloud’s location. Then hold the wave path fixed while changing the moisture assumption.

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Rumours & reporting

Same Numbers, Different Rulers: The Same Height?

Apply two rulers to practice numbers of 5 feet plus 2 inches. Then change only the neighbours of a fictional 168 cm bar. Examine units and comparisons separately.

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Photographs & images

Separate the light and focus behind a white circle

Exclude and include the same particle’s flash contribution, then change focus to compare a broad circle with a small point.

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Exhibits and devices

What presses the two hemispheres together?

Change inside pressure first, then only the circular opening’s area. Compare the pressure resultant on one hemisphere.

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Observation and interpretation

Why do trees pass while a distant light seems to linger?

Move only the observer sideways and compare nearby and distant image positions. Then keep the same move and change a fictional reference point’s distance.

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Rumours & reporting

What Can One Echo Arrival Time Tell You?

Change a target’s front distance, then fix the distance while changing its outline. Compare the result and the information still missing.

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Photographs & images

How can a small spacing difference produce broad bands?

Compare two original patterns’ spacing, then keep the difference while changing only one pattern’s direction.

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Exhibits and devices

Can a smaller air pocket make the same diver tend to sink?

First change pressure at fixed mass, then mass at fixed pressure. Compare displaced-water mass with the diver’s mass.

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Observation and interpretation

Can the same light twinkle differently after crossing the atmosphere?

Compare three received values from one point source, then combine four source patches at the same baseline received level.

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Rumours & reporting

Unfold a Helmet’s Date and Evidence Role

Check which period two finds belong to, then compare what an archaeological object and later stage source establish beneath a shared horn symbol.

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Each experiment explains its model and the limits of what it can show on its own page.