It’s time for another trip around the solar system on the BIGGER and BETTER Science Weekly!

In this episode of the Fun Kids Science Weekly, we answer YOUR questions, have scientists battle it out to determine which science is the best, and this week we're learning all about why planets are round-shaped!

First up, we investigate NASA's plan to put a nuclear reactor on the Moon by 2030 — a huge step toward powering future lunar bases! Then, we’ll explore a volcano that erupted for the first time in over 500 years, shaking things up in a way no one’s seen for centuries. And finally, Dan is joined by evolutionary scientist Angus Davinson, who explains the mission underway to save snails threatened by their beauty.

Then, we answer your questions! Barney wants to know: how Carbon is made, and reserve astronaut Meganne Christian answers Sean's 'Why do astronauts need space food?'

In Dangerous Dan, we learn all about the Spider-tailed horned viper

And in Battle of the Sciences, Neil Raath from the University of Warwick reveals how Sustainable Materials and Manufacturing could be key to saving our planet!

What do we learn about?

· What NASA is planning to build on the Moon
· How Carbon is made
· Why planets are round-shaped
· The deadly Spider-tailed horned viper
· And in Battle of the Sciences... how to help save our planet!

All on this week's episode of Science Weekly!