EARTH'S SURFACE
0.7m
RABBIT WARRENS
AND MOLE BURROWS
Moles can dig 20m of tunnel per day
1m
A PIG CAN SNIFF OUT TRUFFLES UP TO THIS DEPTH
But the largest truffle ever found was sniffed out by a dog. It weighed 1.48kg
1.8m
STANDARD GRAVE DEPTH IN WESTERN CULTURE
Actual depths can vary, but the term 'six feet under' originated in 1665 in plague-ridden England as a stipulation from the Mayor of London to avoid further infection
3m
DEEP-BURROWING EARTHWORM SPECIES
One giant species, Drawida grandis, can be more than a metre long
4m
TUTANKHAMUN'S TOMB
Discovered in 1922 by archaeologist Howard Carter in Egypt's Valley
of the Kings
5m
OLYMPIC DIVING POOLStandard depth for a 10m platform
6m
MAXIMUM RANGE OF MOST METAL DETECTORS
A car buried this deep could be picked up by a high-end metal detector but smaller items would be missed