81.   Scientists have known for decades that trees and other plants absorb carbon dioxide as they grow and that some soils do as well.

82.   Scientists have known for years that animals produce chemicals that are picked up by receptors within the nose of another of the same species.

83.   Scientists have known for years that certain shots sometimes cause fevers resulting in seizures.

84.   Scientists have known for years that eating large amounts of saturated fats, such as the fat found in dairy products, is linked to heart disease.

85.   Scientists have known that Ebola usually spreads from an infected person to another individual and through contamination in clinics or hospitals.

86.   Scientists have known that genetically altered traits like resistance to herbicides can be transferred from crops to related weeds through cross-pollination.

87.   Scientists have long known that insect species can hone their skills over evolutionary time to become expert at attacking a single species of plants.

88.   Scientists have long known that there is a link between serious depression and the ability to ward off diseases.

89.   Scientists have long known that viruses that are harmless for one species can can cause fatal disease in another.

90.   Scientists knew that the drug was effective in treating some disorders but they did not know why.