How did astronomers go to space?

How a difference in the sequence of nucleotides in a gene could result in one of these boys being albino and the other boy having normal skin and hair color? Why does variation increase the likelihood that at least some members of a species will survive in a changed environment? What is the solubility of Thorium? What organs are in the epigastric region? How are the curtains in caves formed? What are the North European plain is known for 3 primary geographic factors? Were does peristalsis occur? Elements in the nobel gas group on the periodic table? What is a gum vulcanizate? What can kids do to slow down global warming? What are two non living things in a grassland? Are tulip and orchids bisexual flowers? What is the difference between a focus and an epicenter How does the intensity of an earthquake change with increasing focus depth? What is the color of a gumamela extract in a base? What is sensory impairments and list 4 types of sensory impairment? What two mating bacteria ame cell-to-cell contact by a thin temporary cytoplasmic bridge through which the plasmid from the cell travels to the other cell? What are the Morphometric Methods? How many ounces in 950 cc? What is order process? An exercise in which muscles are contracted and held for a few seconds but the body doesn't move?