Sunday, February 9, 2014

Footprints in the Mud

Scientists Find 800,000-Year-Old Footprints in UK
Archaeologists announced Friday that they have discovered human footprints in England that are between 800,000 and 1 million years old — the most ancient found outside Africa, and the earliest evidence of human life in northern Europe.

A team from the British Museum, London's Natural History Museum and Queen Mary college at the University of London uncovered imprints from up to five individuals in ancient estuary mud at Happisburgh on the country's eastern coast.

British Museum archaeologist Nick Ashton said the discovery — recounted in detail in the journal PLOS ONE — was "a tangible link to our earliest human relatives."

Preserved in layers of silt and sand for hundreds of millennia before being exposed by the tide last year, the prints give a vivid glimpse of some of our most ancient ancestors. They were left by a group, including at least two children and one adult male. They could have been be a family foraging on the banks of a river scientists think may be the ancient Thames, beside grasslands where bison, mammoth, hippos and rhinoceros roamed.

Rhinos and hippos in England? That would have been a very different place than the modern place.  Perhaps a little more exciting, too.
The researchers said the humans who left the footprints may have been related to Homo antecessor, or "pioneer man," whose fossilized remains have been found in Spain. That species died out about 800,000 years ago.

Ashton said the footprints are between 800,000 — "as a conservative estimate" — and 1 million years old, at least 100,000 years older than scientists' earlier estimate of the first human habitation in Britain. That's significant because 700,000 years ago, Britain had a warm, Mediterranean-style climate. The earlier period was much colder, similar to modern-day Scandinavia.
I guess these guys must have burned a lot of coal, to get that much climate change, right?
Natural History Museum archaeologist Chris Stringer said that 800,000 or 900,000 years ago Britain was "the edge of the inhabited world. This makes us rethink our feelings about the capacity of these early people, that they were coping with conditions somewhat colder than the present day," he said.
800,000 to 900,000 years ago would make it before the known appearance of Neanderthal Man, and possibly earlier than Heidelberg Man, thought to be the common ancestor of Modern humans (us, or most of us, anyway), Neanderthal and Denisovans, making H. antecessor the likely candidate.
Isabelle De Groote, a specialist in ancient human remains at Liverpool John Moores University who worked on the find, said that from the pattern of the prints, the group of early humans appeared to be "pottering around," perhaps foraging for food.

She said it wasn't too much of a stretch to call it a family.  "These individuals traveling together, it's likely that they were somehow related," she said.
At that time, the English Channel had not yet been carved by the catastrophic failure of a glacial dam which held back a huge glacial lake, between 180 and 450 thousand years ago. These people could have walked there from what is now France, no swimming or boats required.


The footprint find will form part of an exhibition, "Britain: One Million Years of the Human Story," opening at the Natural History Museum next week.

The footprints themselves, which survived for almost 1 million years, won't be there. Two weeks after they were uncovered, North Sea tides had washed them away.
That's just wrong, they should have found some way to preserve them.

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