Migraine is a debilitating and often recurring headache disorder that affects millions of people worldwide. Symptoms of a migraine typically include a severe headache, nausea, sensitivity to light and sound, and vomiting. The exact cause of migraines is unknown, but it is believed to be related to changes in...

William Stanley Jevons was an English economist and logician, known for pioneering the Marginalist Revolution and for his use of the differential calculus in economics. William Stanley Jevons (1835-1882) was born in Liverpool to a wealthy merchant family. He entered  University College London , but due to the bankruptcy of the family businesses, he had to withdraw from studies and travel to Sydney, Australia to work for several years at the Mint.