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Warty Pig Is Oldest Animal Cave Art
Live Science
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10/16/2024
A 45,500-year-old warty pig drawing is the oldest known cave painting of an animal on record. The piggies were painted in Indonesian caves.
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00:00
The oldest rock art of an animal on record is a very hairy and warty pig,
00:05
found in an Indonesian cave that dates back to 45,500 years ago.
00:14
The pig itself is actually quite large. It measures four and a half feet or 136 centimeters
00:20
in length and it has the outline of two human handprints by its rump. Here's a brighter image
00:26
of it created with the computer program called decoloration stretch or de-stretch, which is
00:30
often used to study and digitally enhance rock art. The entire panel shows this large pig facing two
00:36
or three other pigs and they're having some kind of social interaction. What's with all these warty
00:41
pigs? It turns out that these wild animals known as Sulawesi warty pigs are native to the island
00:48
of Sulawesi and they were hunted by the ancient people who lived here and were even domesticated
00:54
by them. It seems clear that early humans interacted closely with this pig on various
00:59
levels for a very long period of time. In fact, the ice age artists of Sulawesi almost seem to
01:05
have been obsessed with these warty pigs, which is perhaps not surprising given their economic
01:09
importance. According to Adam Brown, the study's lead researcher and an archaeologist at the
01:14
Australian Research Center for Human Evolution at Griffith University. After finding these warty
01:19
pig drawings and limestone caves, the scientists figured out how old they were using uranium series
01:24
dating. Basically, when rainwater seeps through a limestone cave, a tiny bit of uranium from the
01:31
environment dissolves in the water. Over time, this dripping forms a mineral known as calcite
01:37
that grows on the cave walls. That's exactly what happened here. Some calcite with the radioactive
01:43
element uranium grew over part of the cave art. So the scientists chipped away a few samples of
01:48
calcite and measured the radioactive decay. Essentially, uranium decays into thorium, so they
01:54
measure the ratio of uranium to thorium in each sample. In the end, they determined that the pig
01:59
painting was at least 45,500 years old. However, outside researchers noted there were a few technical
02:05
difficulties with the uranium-thorium dating in the study, so the date is more of a rough estimate
02:10
than an exact date. But given that there's a lot of other rock art in Indonesia and on Sulawesi
02:16
island, including a warty pig drawing in another cave that's at least 43,900 years old,
02:22
the new study provides more evidence that Indonesia was an early hot spot for rock art.
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