At root, the word science means to know. So the person who understood the operation of a spear, or of an adze, would have been practicing science.
So in prehistory is the short answer to the when.
Science Solar System Sun
A science letter that starts with A is ASTRONOMY!!
Velocity and volume are science words.
Some words related to space science that start with A:Apollo Missionsastronautsastronomyasteroidsatmosphereadventureamazing photosArmstrong, Neil
atom
Observation
me
1519
for me an my school science week has already been for 2011!!
Biology is the science of life.
Hypothesis
Igneous!