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.
Answers. 1  A quark is a particle found in protons and neutrons. Their mass is unknown, but they are the smallest subatomic particles. 2  Aerogel a.k.a blue smoke is the lightest most expensive thing on earth. 3  The lightest stable gas is Helium gas. Lightest solid is Aerogel, which weighs .0003 g/cm3.