The Speed of 23 Things in Descending Order

Speed	Note
670,616,629 mph or 1,079,252,848 km/h	The speed of light (in a vacuum).
2,188 mph or 3,529.56 km/h	Air speed record set by SR-71 “Blackbird”
1041 mph or 1675 km/h	The rotational speed of Earth.
769 mph or 1238 km/h	The speed of sound (through air).
763 mph or 1228 km/h	Land speed record in jet car, averaged over 1 mile.
363 mph or 581 km/h	Fastest Maglev train (Japan)
357 mph or 574 km/h	Fastest conventional train (France)
200 mph or 320 km/h	Fastest bird. The Peregrin Falcon which eats other birds and needs to be faster to hunt them. 200 mph is an approximate speed.
70mph	Fastest land animal- The Cheetah.
68 mph	Fastest aquatic animal- The Sailfish.
60mph	Fastest running speed on 2 legs- Ostrich.
45 mph	Fastest dog- The Greyhound
27.89 mph	Fastest human (during a sprint)
21mph	Fastest reptile- Spiny-tailed Iguana
3 mph 5km/h	Average walking speed of a human
5 mph	Fastest insect tiger beetle
0.17 mph or 0.27 kmh	Average speed of the Giant Tortoise
0.03 mph or 0.48 kmh	Garden Snail
0.01 mph or 0.016 kmh	Seahorse
3.81 cm or 1.5 inches per hour	Fastest growing plant- Bamboo. That’s 91.44 cm or just over 3 feet per day!
15 cm or 5.9 inches per year	Speed of hair growth. Roughly 1.25 centimeters or 0.5 inches per month. With age the speed of hairgrowth might slow down to as little as 0.25 cm or 0.1 inch a month.
2.3 cm (or 0.9 inches) per year	Speed of fingernail growth (on average in adults) about 0.02 inches a week (or almost half a millimetre).
1.9cm or 0.75 inches per year	Speed of continental drift.

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