How long is 720,000,000,000 nanoseconds?
It's about as long as The First spacewalk
The length of The First spacewalk is about 720,000,000,000 nanoseconds.
(1965) (Alexi Lenovo, a.k.a. Алексе́й Архи́пович Лео́нов)
It's about seven-tenths as long as Louis-Antoine's reign
The length of Louis-Antoine's reign is about 1,000,000,000,000 nanoseconds.
(a.k.a. Louis-Antoine d'Artois, petit-fils de France, fils de France, duc d'Angoulême, a.k.a. Count of Marnes) (1830)
It's about one-fourth as long as a Basketball game
The length of a Basketball game is about 2,880,000,000,000 nanoseconds.
(NBA regulation; playing time only)
It's about one-fifth as long as an American football game
The length of an American football game is about 3,600,000,000,000 nanoseconds.
(per NFL rules; playing time only)
It's about one-tenth as long as a Football match (Soccer game)
The length of a Football match (Soccer game) is about 5,400,000,000,000 nanoseconds.
(a.k.a. Association Football, a.k.a. soccer) (per FIFA rules; playing time only)
It's about thirteen-and-a-half times as long as The San Francisco earthquake of 1906

The length of The San Francisco earthquake of 1906 is about 52,500,000,000 nanoseconds.
(1906) (Mussel Rock Fault, California) (sensible duration)
It's about one-twentieth as long as Gone with the Wind (film)
The length of Gone with the Wind (film) is about 13,600,000,000,000 nanoseconds.
(1939)
It's about one-thirty-fifth as long as The First Indianapolis 500

The length of The First Indianapolis 500 is about 24,128,000,000,000 nanoseconds.
(a.k.a. Indy 500, a.k.a. International 500-Mile Sweepstakes Race) (1911) (Indianapolis, Indiana)
It's about one-fortieth as long as The Longest Pro Baseball Game
The length of The Longest Pro Baseball Game is about 30,300,000,000,000 nanoseconds.
(1981) (McCoy Stadium, Pawtucket, Rhode Island)
It's about 60 times as long as The First airplane flight (Wright Flyer, 1903)
The length of The First airplane flight (Wright Flyer, 1903) is about 12,000,000,000 nanoseconds.
(Wright Flyer) (1903)
It's about one-seventieth as long as The First light bulb test (Edison, 1879)
The length of The First light bulb test (Edison, 1879) is about 52,200,000,000,000 nanoseconds.
(Thomas Edison's filament Thread No. 9) (1879) (total time)
It's about one-eightieth as long as The First Transatlantic Flight (Alcock and Brown, 1919)
The length of The First Transatlantic Flight (Alcock and Brown, 1919) is about 58,300,000,000,000 nanoseconds.
(John Alcock and Arthur Whitten Brown) (1919) (first non-stop flight)
It's about 90 times as long as a Pit Stop
The length of a Pit Stop is about 8,000,000,000 nanoseconds.
(for IndyCar racing; optimal)
It's about one-one-hundred-fiftieth as long as The Battle of Fort Sumter

The length of The Battle of Fort Sumter is about 120,000,000,000,000.00000000000000000 nanoseconds.
(1861)
It's about one-two-hundred-fiftieth as long as The Great Chicago Fire

The length of The Great Chicago Fire is about 200,000,000,000,000.00000000000000000 nanoseconds.
(1871) (Chicago, Illinois)