You've probably heard of dogs in space. Maybe even chimpanzees. But jellyfish? Almost certainly not!

Join Dr Sheila Kanani in this special World Book Day adventure, as she discovers a weird and wonderful cast of animals who have travelled into space, from Ham the chimpanzee to Félicette the cat, and the 60,000 jellyfish who have orbited the Earth (did you know you can also get jellyfish-shaped galaxies?). You'll meet the microscopic creatures that can survive in the vacuum of space, and wonder - could aliens really exist?

This fantastical journey into the wild and surprising realms of space weaves together astronomy, physics and biology, and is sure to inspire space-obsessed and animal-loving kids everywhere.