| Who first explained why the sky is blue? |
| Leonardo da Vinci |
| What do crocodiles do to be able to dive deeper in lakes and rivers? |
| Swallows stones |
| Who was known as the fifth Beatle? |
| Stuart Sutcliffe |
| What is the most popular dog name worldwide? |
| Max |
| What period preceded Picasso's Blue Period? |
| Pink Period |
