In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
Energy flow through an ecosystem.
Beavers can have strong impacts as ecosystem engineers.
A controlled fire being set as part of ecosystem management in Jasper National Park.