Eurypterids are members of an extinct order of arthropods that lived approximately 505 to 245 million years ago. Frequently referred to as giant scorpions, most eurypterids were small, although Pterygotus buffaloenis, a species from the Silurian period, was the largest arthropod ever known, reaching a length of about 10 ft (3 m). Living in brackish waters, some were predators, while others were probably scavengers. Eurypterids were similar in body plan to what modern sea creature?
Back in the day
In 1962, US President John F. Kennedy's birthday was celebrated with a lavish party at Madison Square Garden in New York City. During the event, Monroe took the stage and delivered a sultry version of "Happy Birthday," substituting "Mr. President" for Kennedy's name, a gesture that has served to fuel the persistent rumors that she and Kennedy had engaged in an affair. The performance was one of Monroe's last major public appearances. What did Kennedy say about the song during the party?
Born on a day like today
Hopkins, a US merchant and financier, worked with an uncle as a wholesale grocer before going into business with his brothers in 1819. As he continued to prosper, his interests diversified into banking, insurance companies, steamship lines, and railroads. In his will, he set aside $7 million—the largest philanthropic bequest in US history at the time—for the founding of a free hospital and university in Baltimore, Maryland. His will also called for the establishment of what other institution?