Hungry animals that have once tasted an adult monarch butterfly leave others alone. The adult's bad taste comes from special chemicals in the milkweed that the caterpillar ate.
Infants don't reject different hearts
Infants don't reject different hearts Doctors have successfully given several infants
new hearts with different blood types. Infants do not have
antibodies their blood that would reject a organ with a different
blood type - these antibodies develop as children grow. This
discovery may save many infants by giving them transplants sooner
and less usable hearts will go to waste because the blood types
don't match. MARCH 15, 2001
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