Ancient Footprints
Footprints have been preserved as fossils and provide evidence of prehistoric life. Known as "ichnites", these trace fossils can give clues to the behaviour of specific species of dinosaur. The study of such fossils is known as ichnology and species known only by such evidence are known as ichnospecies. The Grallator is one example of a genus that has left no fossils other than ichnites.
For example, an international team's discovery of a set of 1.5 million-year-old human ancestor footprints in Ileret, Kenya has shown the earliest direct evidence of a modern human style of upright walking. The team believe that the prints were probably formed by the species Homo erectus.
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Famous quotes containing the words ancient and/or footprints:
“An ancient bridge, and a more ancient tower,
A farmhouse that is sheltered by its wall,
An acre of stony ground,
Where the symbolic rose can break in flower,
Old ragged elms, old thorns innumerable....”
—William Butler Yeats (1865–1939)
“Leonid Ivanovich Shigaev is dead.... The suspension dots, customary in Russian obituaries, must represent the footprints of words that have departed on tiptoe, in reverent single file, leaving their tracks on the marble....”
—Vladimir Nabokov (1899–1977)