An unladen purple martin swallow can reach the air-speed velocity of about 24 miles per hour, which may be important information if you’re trying to cross the ‘Bridge of Death’ as you search for the Holy Grail. It’s also probably impossible for that 1.7-ounce bird to carry a 1.2-kilogram coconut, even if he gripped it by the husk (we are checking with the engineering department though).