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.
There are also spots of other colors on the planet as a result of the violent storms that occur there. The Great Red Spot is the most famous storm on the planet. Saturn is a gas planet with bands of orange and white. Ammonia forms the clouds of white, while ammonia hydrosulfide creates the orange clouds.