A substance that makes you ill if you don't eat it.

Investigations during the last few decades have brought hydrogen instead of carbon, and instead of CO2 water, the mother of all life, into the foreground.

Life is water, dancing to the tune of solids.

If I go out into nature, into the unknown, to the fringes of knowledge, everything seems mixed up and contradictory, illogical, and incoherent. This is what research does; it smooths out contradictions and makes things simple, logical, and coherent.

Through the ages, man's main concern was life after death. Today, for the first time, we find we must ask questions about whether there will be life before death.

The source of this energy is the sun's radiation.

A living cell requires energy not only for all its functions, but also for the maintenance of its structure.