As doctors warn it can cause a dangerous reaction with a host of common drugs... 1  Researchers warn that grapefruit reacts with many medicines. 2  The fruit can cause devastating side-effects from stomach bleeding to kidney problems. 3  Doctors say the public is ignorant to the dangers and putting themselves needlessly at risk.
According to the definition of the question (based on light reflection and not light emission), a well-polished mirror is the the whitest substance on earth. The main reflection layer is usually made out of silver.
Flat Earth (also known as the Flat Earth myth, flat-earthism, and less commonly platygeism) is the belief that the earth â which the vast, vast majority of the population imagine in their heads as this big spherical thing (or oblate spheroidal thing, pedants) is actually flat. (Or, at least, cyclindrical.).