Get ready for another BIG and BRILLIANT adventure into the world of science on this week’s Science Weekly!

In Science in the News, there’s good news for giant pandas as they’re officially no longer endangered. We also hear about a major change of command aboard the ISS. Plus, Ruth Williams from The Wildlife Trust joins us to explain why a record number of octopuses are suddenly appearing in UK waters.

The we answer your questions... Ralph wants to know about the different types of stone, and Colin Forsyth from University College London explains what plasma, the forgotten fourth state of matter, is. 

Dangerous Dan returns with a plant you definitely don’t want to mess with as he reveals the deadly science behind the Castor Bean Plant.

And in Battle of the Sciences, Charlie Firth from Oxford University makes the case for vaccines, explaining why they’re one of the most important scientific inventions in human history.

Plus, Professor Hallux and Nanobot are back for another adventure, shrinking down inside the human body to explore how antibiotics work and why they’re so powerful.

This week, we learn about:

• The secret fourth state of matter called plasma

• How vaccines protect your body from disease

• Why pandas are making a comeback

• What’s causing octopus numbers to rise in UK waters

• The dangers of the castor bean plant

All that and more on this week’s Science Weekly!