While it may be tempting to brush off warnings against looking up at this eclipse bare-eyed, don’t: The light of an eclipse really can damage your eyes — though warnings of total blindness are likely overstated. The condition is called solar retinopathy, and it occurs when bright light from the sun floods the retina
Fish need oxygen too, but since they don t have lungs, they take oxygen from the water in which they live. The oxygen in the water available to fish is called dissolved oxygen (oxygen that is dissolved in the water). Fish use gills to take oxygen from water just as we use our lungs to take oxygen from the air.
Candy store owner David Bradley’s shop was flooded during a major storm in 1883. As a result of the flood, his entire stock of taffy was soaked with salty Atlantic Ocean water. When a young girl came into his shop and asked if he had any taffy for sale, he is said to have offered some “salt water taffy.”
Antoine Lavoisier (lah-vwah-ZHAY), 1743-1794, introduced quantitative measurement into the study of chemistry with his discovery of the law of conservation of mass. He discovered the role of oxygen in combustion and established the principles for naming chemicals. He wrote the first modern chemistry textbook in 1789.