Misc: What is the fear of new drugs known as?

Questions

Which word is the Latin for 'pebble' and is now, applied to a branch of mathematics?

In which sport does the term 'to win hands down' originate?

What is the name of the fibrous protein present in the outer layer of the skin and in hair and nails?

What name was given to an Indian soldier in the service of the British?

Which English Leader's body was exhumed from Westminster Abbey and his dead body hanged at Tyburn?