The single invention of the has advanced what we know about the universe more than any other scientific technology.

Which is a characteristic of mixtures?

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?