Scientists are convinced that other stars have planets in orbit about them. Without visiting
these distant solar systems, how can they be sure?

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

not only is it colder, it also becomes darker, less salty, and more dense.

its temperature is increasing. this causes molecular vibrations to increase.