It's a tricky situation that dolphins use their brains to solve! Featuring children from Ballyboy National School in Co. Offaly, Collie Ennis, co-host of The Critter Shed podcast and Marine biologist Stefano Mariani.

A straight question with a wonky answer! Featuring children from Ballyboy National School in Co. Offaly and Biologist Kiri Spanowicz.

A soggy question with a heavyweight answer. Featuring children from Ballyboy National School in Co. Offaly, Biologist Marie Förg and Professor Padraig Dunne at UCD School of Physics.

We could also ask, what does earwax have in common with snot and why do we have them? Featuring children from Ballyboy National School in Co. Offaly and Biologist Kiri Spanowicz

A look into the building blocks of the universe. Atoms! Featuring children from St. Nicholas Parochial School in Galway and Biologist. Kiri Spanowicz

Why microorganisms are superheroes, and why you shouldn't rake up leaves. Featuring children from St. Nicholas Parochial School in Galway and Biologist Marie Förg.

How does oxygen help us run faster, and how do we make muscles? Featuring children from St. Nicholas Parochial School in Galway. And Biologist Kiri Spanowicz.

How do birds sleep and find their way while flying long distances, and which bird has the longest migration? Featuring children from St. Nicholas Parochial School in Galway and Biologist Marie Förg.

Is it because it’s warmer? Because they can find more food before nightfall? Featuring children from St. Nicholas Parochial School in Galway and answers from Biologist Marie Förg.

Why do some animals sleep through the winter while others don't? Featuring children from St. Nicholas Parochial School in Galway, Biologist Marie Förg and Collie Ennis, co-host of The Critter Shed podcast.