Theodor Seuss Geisel, better known by his pen name, Dr. Seuss, graduated Dartmouth College in 1925, then pursued a Doctor of Philosophy (in the US, PhD) in English Literature from Lincoln College, Oxford University. He married in 1927 and returned to the United States without completing his studies.
Penicillium species are one of the most common causes of fungal spoilage in fruits and vegetables. Penicillium italicum and Penicillium digitatum are the most common attackers of citrus fruits, while Penicillium expansum is known to attack apples. P. digitatum works by producing ethylene to accelerate ripening.
Spores from this species of mold are found everywhere in the air and soil. As mentioned earlier, Penicillium species are one of the most common causes of spoilage of fruits and vegetables. For example, P. italicum and P. digitatum are common causes of rot of citrus fruits, while P. expansum is known to spoil apples. Penicillium chrysogenum is the most common species in indoor environment.