It started with a mystery and then a high-tech search. In the 1990s, Dr. Jonathan Zehr, an ocean ecologist at the University of California, found an eye-catching DNA sequence in the water samples he was studying. Analysis of the sequence…
It started with a mystery and then a high-tech search. In the 1990s, Dr. Jonathan Zehr, an ocean ecologist at the University of California, found an eye-catching DNA sequence in the water samples he was studying. Analysis of the sequence…
The basic unit of all living organisms, from bacteria to humans, is the cell. Robert Hooke first described the cell in 1665, when he used a microscope to examine a piece of cork. To his eyes, he saw an orderly…