Diameter7.2 tenths m
2.9 tenthsSunflower heights
26.7 millionthsMalta lengths
8.5 thousandthsOlympic straights
Photo from Wikimedia Commons
Ancient Wheel
The circular invention that everything else rolled from/Inventions & Discoveries
The oldest known wheel was found in the Ljubljana Marshes of Slovenia, dating to around 3150 BCE. It is a solid wooden disc about 72 cm in diameter and 5 cm thick, made from ash and oak. The wheel was part of a two-wheeled cart. Surprisingly, the potter's wheel may have been invented before the transport wheel. This simple rotary device became the foundation for countless later technologies.
Measurements
Thickness5 hundredths m
5 thousandthsFire engine lengths
2.5 hundredthsDoorway heights
3.3 hundredthsDolly Partons
Estimated mass9.5 kg
950 quintillionRhinovirus particles
4.19Bags of flour
3.2 hundredthsFull bathtubs
Axle hole diameter5 hundredths m
2.2 tenthsWine glass heights
150 millionthsAircraft carrier lengths
1.2 quintillionthsProxima Centauri trips
Age163 billion s
8.2 millionNYC-to-LA flights
906 millionCommercial breaks
Circa 3150 BCE
Face area4.1 tenths m^2
89.5Playing cards
1.6 thousandthsTennis court areas
2,713Pinky fingernails