The Mexican Free-tailed Bat is widely regarded as one of the most abundant mammals in North America and is not on any federal lists. However, its proclivity towards roosting in large numbers in relatively few roosts makes it especially vulnerable to human disturbance and habitat destruction.
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.
