On January 7, 1610, the Italian astronomer Galileo Galilei discovered three of Jupiter's moons: Callisto, Europa and Io. When you purchase through links on our site, we may earn an affiliate ...

DNA replication is the biological process by which an exact copy of a deoxyribonucleic acid (DNA) molecule is created and it is the basis for biological inheritance. Each of the two strands of the DNA ...