It can be an upsetting, humiliating and often frightening experience to be trolled.

Trolling - where internet users post deliberately provocative and aggressive statements against a person - is unfortunately a common part of internet culture and it regularly made front page news in 2014, from the Scottish charity who labelled J.K. Rowling a "b***" for donating money to Scotland's anti-independence campaign, Better Together, to Cambridge University professor Mary Beard's public battle with her abusers on Twitter, which she went on to befriend.

But trolling isn't a modern-day phenomenon.

A resurfaced century-old letter from Albert Einstein to Marie Curie shows that the legendary female scientist, who discovered the X-ray and won two Nobel prizes, also faced the criticism of trolls.

In the letter (below) from 1911, which was recently discovered in a huge trove of new Einstein letters and published online this week, Einstein praises her work and offers some timeless advice on dealing with haters.

Einstein's inspiring advice to Marie Curie on trolls ‘Don't read that hogwash’