The tracks, which were discovered near the southern tip of the African continent, are approximately 153,000 years old.
Charles HelmThe prehistoric human footmark found in South Africa , outlined in methamphetamine .
Archaeologists in South Africa have discovered the oldest known footprints attributed toHomo sapiens , thanks to a forward-looking form of dating known as optically - stimulated luminescence ( OSL ) . Incredibly , the footprints in interrogative date back a whopping 153,000 geezerhood .
The researcher ’ findings were publish in the journalIchnos , in which they explicate how they used this date method to trace the origins of prints notice at multiple “ ichnosites ” — archaeological site with tracks allow by other homo — near the southern tip of the African continent .
Charles HelmThe prehistoric human footprint found in South Africa, outlined in chalk.
imprint found at these ichnosites were wide-ranging . Four of the land site revealed hominin tracks , one featured knee printing , and four had “ ammoglyphs ” — a oecumenical term representing any preserved pattern made by humans .
Not long ago , finding human tracks date back more than 50,000 days was extremely rare , but as clock time has gone on , extensive inquiry and psychoanalysis has revealed prints that are far sr. . Still , sketch atomic number 82 author Charles Helm toldLive Sciencethat he and his colleague were “ pleasantly astound ” when they identified one track site date back 153,000 years .
Most of the other samples that they study dated to between 70,000 and 130,000 years ago , Helm , a research companion at the African Centre for Coastal Palaeoscience at Nelson Mandela University , said .
Charles HelmA 3D photogrammetry image of another prehistoric human footprint dating back around 80,000 years.
To excuse how Helm and his team influence the engagement of these ancient footprint , OSL works by analyzing grain of quartz or feldspar near the fossilized tracks . Researchers can apply this data to then guess how much time has passed since those grains were last exposed to sunlight .
If surfaces coat with prehistorical human track were quickly covered over , then the crystal or feldspar cereal around them would have been too . By determining when these grain were buried , researchers can get a decorous estimate of when the footmark were create .
In this case , theHomo sapienstracks were allow for on wet George Sand , and then quickly enshroud as ironic sand was carry by the current of air .
While OSL ca n’t trace the footprints to theexactyear of their conception , it can give researchers a “ reasonably convinced ” estimate .
Charles HelmA 3D photogrammetry image of another prehistoric human footprint dating back around 80,000 years .
In any case , this discovery marks the recognition of the oldest knownHomo sapiensfootprints . While older , preserved hominin tracks have been find throughout Africa , they can not be assign toHomo sapiens , which evolve in the continent approximately 300,000 old age ago .
As Helm and his study co - writer Andrew Carr explain toThe Conversation , the discovery of these ancient footprint “ are a utilitarian way to complement and enhance our understanding of ancient hominins in Africa . ”
Relatively few hominin pearl have been discovered near the Cape coast , where the ancient footprint were found , which often lead researcher to look elsewhere when tracing the movement of humanity throughout Africa . However , these track as well as other grounds from the time period of time , admit stone tools , fine art , and jewelry , indicate that ancient humans lived and thrived along the Cape coast before spreading out to other places .
As the researcher wrote in the field , these caterpillar track “ can cater not just an indication of mankind travelling across these surfaces as soul or radical , but also evidence of some of the activities that they engaged in . ”
The Cape seashore is also especially well - suited to OSL analytic thinking , given that it is high-pitched in lechatelierite , which provides significant glow . The abundant cheer , winds , and wide beach also mean that any “ pre - survive luminescence signals are full transfer prior to the burial outcome of interest , ” allowing researchers to get a more accurate age estimate .
As Helm toldLive Science , this discovery has “ act as a spur track to continue our lookup for hominin tracks in deposits we know are even older . ”
That say , the researchers also occupy that time is running out for canvas these site . The plentiful sand and winds in the realm are both a blessing and a curse for research as ancient hominin tracks were well - preserved as a result , but these region are also know for being extremely vulnerable to eating away .
“ We often have to act upon fast to record and dissect them before they are destroyed by the ocean and the wind , ” they wrote .
Still , Helm and his colleagues are sure-footed that additional hominin ichnosites are waiting to be found near the South African coastline . They would also care to expand this research , focusing on older sites in the area date from 400,000 years to 2 million years ago to see what they find .
After reading about this new uncovering , hear aboutanother late study that uncovered new groups of prehistoric humans in Europe . Or , read all aboutNeanderthals , the ancient hominins that went extinct 40,000 years ago .
