3

Amazing Earth - Part 1

3

The Earth

4

Extreme Earth

4

Earthquakes

3

Amazing Earth - Part 2

3

Comets

3

Garbage Travels

2

Evergreen Forests! Taiga

3

Meteorites, Meteoroids, and Meteors

3

Uranus

3

Archipelagos of the World

3

Senses

2

Ecosystems

4

Belém Tower, Portugal

3

Wetlands of the World

3

Mountains of the World

3

Saturn

3

Oceans and Seas of the World

3

Straits of the World

3

The Moon

3

Pressure

2

Treeless Plains! Steppe

3

Solar System

3

Charles Darwin

3

Zuri's Launch

4

Lightning

4

Montane Forest

3

Canyons of the World

4

Tornadoes

3

Pollution