coli infections and sends letters to other stem cell companies reminding them to follow the rules. How a dinner-table conversation between two biologists led to the formulation of the theory that ...

Such observations might seem ho-hum today, but they were unprecedented at the time. Robert Hooke had coined the word “cell”—short for cellula, or “small compartment” in Latin—in the mid-17th century, ...

However, Schwann, one of the early proponents of the cell theory, had already recognized this possibility in 1839 when he stated, ‘We have seen that . . . cells are formed and grow in accordance ...