Educational: Mathematics, science and technology, general

Which works better to haul a pumpkin-a lever or wheels and axles?

Which makes it easier to lift a large toy-a wedge or wheels and axles?

Is it easier to move ice with a lever or a screw?

Is it easier to lift a bag full of toys with an inclined plane or a pulley?

These kids are playing a game, trying to move a person with a simple machine.

Is it easier to move heavy box with an inclined plane or wheels and axles?

Discover the inspiring true story of Isatou Ceesay, an African woman who started a recycling movement to combat the pollution caused by plastic bags in her community.

The octopus spies a nice, tasty mantis shrimp.

Do you want to be your own naturalist and watch animals out there where they belong?

What happens when you find yourself stranded in the big outdoors, without a phone or computer in sight?

Do you want to experience what it's like to chart new territory and survive the unexpected?

Are you fascinated by wide open spaces and like NOT knowing where a path might lead?

Team up with Ackerley the Acanthostega to travel back 66 million years to the Tertiary and Quaternary periods of prehistoric Earth, when mammals came to dominate the planet.

Come along with Ackerley the Acanthostega to visit the Triassic and Jurassic periods, 203-145 million years ago.

Join Ackerley the Acanthostega and travel back in time 4,500 million years to the Precambrian period, when our planet first formed.

Follow Ackerley the Acanthostega through the Cretaceous period, 145 to 66 million years ago, when the mightiest dinosaurs stalked the planet.

What animal was here?

As the planet's human population explodes, so does the demand for water.

In 2013, the FBI started posting a new most wanted list-not for kidnappers, murderers, or armed robbers, but for online crooks.

Discover the inspiring true story of Isatou Ceesay, an African woman who started a recycling movement to combat the pollution caused by plastic bags in her community.

Have you ever solved a tricky puzzle?

Have you ever built a cool science project?

Do you enjoy snapping photos or taking movies of your adventures?

Have you ever wondered how the universe began?

How did our knowledge of matter, gravity, and electricity develop over time?

How did our knowledge of cells, heredity, evolution, ecosystems, and photosynthesis develop?

Sunlight, air, water, and minerals help keep plants alive.

A plant can form fruit and seeds when it is pollinated.

Sunlight helps a plant make its own food using photosynthesis.

Plants have roots, stems, leaves, and sometimes flowers.

Roots help keep plants alive.

Some flowers are able to produce seeds or fruit without getting pollen from another plant.

The flower is the part of a plant that makes seeds or fruit.

Many insects drink nectar and collect pollen from flowers, and in the process they help plants reproduce.

Some plants need to have pollen spread from one plant to another flower in order to reproduce.

Many plants depend on animals to help move pollen around so that the plants can reproduce.

Plastic: it's used to make everything from drink bottles and bags to toys and toothbrushes.

Did you know that about 40 percent of the world's population lives without toilets?

After the 1986 Chernobyl nuclear explosion in Ukraine, scientists believed radiation had created a vast and barren wasteland in which life could never resurface.

Ice in the Arctic is disappearing-and opportunity is calling.

The octopus spies a nice, tasty mantis shrimp.

What animal was here?

Does the universe circle around Earth?

Do your eyes send out light like headlights?

Do bulls get angry when they see the color red?

Math is everywhere in shopping!

Math is everywhere when you're traveling!

Math is everywhere in the kitchen!

Math is everywhere in sports!

Robots help us understand our universe.