A living, changing planet

Follow air, water and energy through familiar places. Test a model, inspect a real observation and keep their different limits in view.

Start with the first experiment Search & filter this collection 10 available explorations · choose any starting point

Interactive exploration

Cells, Life & EvolutionViruses, bacteriophages and host-dependent replication

How does a virus make copies without its own cell?

Open a real MS2 reconstruction, follow its RNA, and test what happens when a needed step is missing. Discover whose instructions, tools and materials make new particles possible.

Source structures, host dependencies & evidence labExplore at your own pace

#viruses #bacteriophages #MS2 #RNA

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Interactive exploration

Body & HealthCellular respiration, mitochondria and ATP

How does a snack help power a run?

Charge a tiny membrane, disconnect its supply, and choose where the stored driving force goes. Discover how cells couple fuel chemistry to ATP—and why a bypass changes the result.

Molecular machine, energy & evidence labExplore at your own pace

#cellular respiration #mitochondria #ATP #oxygen

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Earth, Weather & ClimateOcean tides, high and low water, spring and neap tides

Why does the sea rise and fall each day?

Keep one clock at three real waterfronts. Reveal which water level rises next, build a tide from repeating rhythms, and discover why the Moon does not give every coast the same pattern.

Coastal records & tidal rhythm labExplore at your own pace

#tides #ocean #Moon #gravity

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Earth, Weather & ClimateVolcanoes, magma, lava and why eruptions differ

Why can lava flow, fountain—or break into fragments?

Watch real lava feed a channel. Take apart a gas-volume calculation, compare Mount St. Helens through time, inspect volcanic rock under a microscope and explore an actual surveyed crater.

Real eruption footage & surveyed terrainExplore at your own pace

#volcanoes #magma #lava #gas

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Earth, Weather & ClimateThunderstorms, cloud growth, moisture, lifting and updrafts

What helps a cloud grow into a thunderstorm?

Step through real satellite observations, release an air parcel into a measured atmosphere, and discover why moisture, lifting and the surrounding air all matter.

Observed atmosphere & parcel labExplore at your own pace

#weather #clouds #thunderstorms #buoyancy

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Earth, Weather & ClimateAir quality, PM2.5, particle filters, ventilation and AQI

What is hiding in the air you breathe?

Open a room, plan when to exchange its air, and lift the cover off a particle filter. Follow the mass, inspect real observations, and discover what an AQI number can—and cannot—tell you.

3D model & experimentsExplore at your own pace

#air quality #PM2.5 #particles #filtration

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Interactive exploration

Earth, Weather & ClimateThe water cycle

Where can a drop of rain go next?

Follow water above and below the surface. Pave part of the land, change evaporation, and watch the water budget rearrange.

Interactive model & diagramsExplore at your own pace

#water #earth #weather #watershed

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Interactive exploration

Earth, Weather & ClimateThe greenhouse effect

How can a planet warm without receiving more sunlight?

Freeze two model temperatures, change infrared transfer and release time. Follow every energy route, move the accounting boundary and compare the model with real atmospheric evidence.

3D model & experimentsExplore at your own pace

#greenhouse-effect #infrared #energy-budget #climate

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Interactive exploration

Cells, Life & EvolutionPhotosynthesis and plant growth

Where does a plant get the material to grow?

Open a leaf, explore a chloroplast, and supply a tiny carbon-building recipe. Discover what comes from air, what comes from water, and what light contributes.

3D working model & experimentExplore at your own pace

#plants #carbon #photosynthesis #chloroplasts

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