Evening Bat Exodus, Mexican Free-Tail Bats, Tadarida brasiliensis, Carlsbad Caverns NP, New Mexico
In late 18th century, scientists made important progress in replicating naturally carbonated mineral waters. In 1767, Englishman Joseph Priestley first discovered a method of infusing water with carbon dioxide to make carbonated water which has 3.4 mg in the drink when he suspended a bowl of distilled water above a beer vat at a local brewery in Leeds, England.
The Eastern Pondhawk (Erythemis simplicicollis), also known as the Common Pondhawk, is a dragonfly of the family Libellulidae, native to the eastern two-thirds of the United States and southern Ontario, Canada. The species is distinguished in that the female is bright green and the adult male is nearly entirely blue.
