Jess Zimmerman:

In an episode of The Simpsons called Blood Feud, the ancient Mr Burns is revitalised by a transfusion from 10-year-old Bart, who shares his rare blood type. After the procedure, the usually decrepit Burns glad-hands his way around the nuclear plant he owns, trilling cheerfully: 'Hey there, Mr Brown-Shoes! How about that local sports team?' 'It's funny, Smithers,' he muses to his obsequious right-hand man. 'I've tried every tincture and poultice and tonic and patent medicine there is, and all I really needed was the blood of a young boy.'

Now, there is scientific evidence that Mr Burns was right.

Marcelo Gleiser:

As the Island of Knowledge grows, so do the shores of our ignorance.

Tim Radford:

A couple of decades ago, physicists spoke confidently of a "theory of everything" and one or two even proposed an "end to science". All has now changed. The mysteries have multiplied.

Taylor Swift:

I have to stop myself from thinking about how many aspects of technology I don't understand.