brokensecrets.com

a8BOy TIL that the rectangular 9 volt battery, king of toy batteries, is actually made of 6 small cylindrical 1.5 volt batteries.
wo8mP TIL The World Factbook, published by the CIA, lists Australia’s coastline at 25,760 km (16,007 miles) and Japan’s at 29,751 km (18,486 miles). The World Factbook is wrong according to other measures which put Australia's coastline at 66,530 km (41,340 miles)
kJvO7 TIL that 9-volt batteries are made of 6 roughly AAAA-sized cylindrical batteries