Vikings were fierce warriors who sailed the seas looking for new lands. They were expert sailors and shipbuilders. Find out the science behind their explorations, shipbuilding and daily life. Discover how modern technology is being used to discover more about the lives of Vikings and their expeditions.

Deep underwater, something shifts. Ocean water pulls back from the shore, then comes flooding back. It's a tsunami! These massive waves happen when earthquakes or other actions cause huge amounts of water to shift. Learn about tsunamis, pay attention to warnings and stay safe.

Vikings were fierce warriors who sailed the seas looking for new lands. They were expert sailors and shipbuilders. Find out the science behind their explorations, shipbuilding and daily life. Discover how modern technology is being used to discover more about the lives of Vikings and their expeditions.

A rumble deep inside Earth. Hot, flowing magma is trapped and needs a way to escape. Pressure builds and causes a break in the surface. Eruption! Volcanic eruptions can shoot lava, ash and smoke over a huge area. Why do they happen? Learn about volcanoes, what causes them and how to be prepared.

Deep underwater, something shifts. Ocean water pulls back from the shore, then comes flooding back. It's a tsunami! These massive waves happen when earthquakes or other actions cause huge amounts of water to shift. Learn about tsunamis, pay attention to warnings and stay safe.

Dutch student Boyan Slat always loved inventing. A visit to the oceans of Greece inspired his greatest invention ever. Why were there more plastic bags than fish? How could he save the sea? Learn more about Boyan’s Great Pacific Garbage Patch project; The Ocean Cleanup and his plastic cleanup invention, System 001; and the challenges behind removing rubbish from our oceans and rivers.

A rumble deep inside Earth. Hot, flowing magma is trapped and needs a way to escape. Pressure builds and causes a break in the surface. Eruption! Volcanic eruptions can shoot lava, ash and smoke over a huge area. Why do they happen? Learn about volcanoes, what causes them and how to be prepared.

Lionel Messi is a superstar football player. But what happens when he’s not scoring goals on the pitch? High-interest details and bold photos of his fascinating life will enthrall reluctant and struggling readers, while carefully levelled text will leave them feeling confident.