Way back on the Indonesian island of Flores, Komodo dragons ate first, ripping into the flesh of cow-sized elephant kin and stripping their bones. Our tiny human family most likely picked on the leftovers, researchers report July 3 in Science Advances.
The brand new examine challenges scientists’ understanding of the conduct of Homo floresiensis — extinct, one-meter-tall hominids nicknamed “hobbits.” It suggests the island’s small-statured residents didn’t hunt massive sport in any case however as an alternative scavenged a few of their meals. In that case, that raises questions on H. floresiensis’ evolution and stage of sophistication.
Tens of hundreds of years in the past, the island had each giants and dwarves. In isolation, native species of stork and rat grew to immense sizes. Three-meter-long venomous Komodo dragons stalked the hilly terrain. Different species advanced smaller sizes. These included the miniaturized elephant relative Stegodon florensis insularis — which was simply 1.2 or 1.5 meters tall — and the hobbits, who disappeared round 50,000 years in the past.
When H. floresiensis was first described greater than 20 years in the past from Liang Bua cave, purported lower marks on elephant bones and charred stays from different animals led some researchers to suggest that the hominids had advanced behaviors stunning for his or her small mind measurement: killing giant prey and controlling hearth. However researchers hadn’t but performed a scientific evaluation of the bones to assist verify this concept.
Elizabeth Grace Veatch, a paleoanthropologist on the Nationwide Museum of Pure Historical past in Washington, D.C., and her colleagues analyzed the marks on greater than 3,000 fragments of historic Stegodon bones from Liang Bua courting from 190,000 to 50,000 years in the past. The researchers additionally fed goats to stay Komodo dragons and analyzed the form of tooth marks left behind on the bones utilizing 3-D imaging. The marks on the Stegodon and goat bones have been related and didn’t appear to be cuts made by people’ stone instruments. There have been additionally no impression marks on the traditional bones from spear ideas.
Komodo dragons have been those butchering the elephants, not the island’s diminutive hominids, the workforce concludes. As an alternative, any elephant meat H. floresiensis ate was most likely scavenged from the leftovers.
“Komodo dragons sometimes eat almost all edible mushy tissues of their prey, typically leaving as little as round 12 p.c of the carcass,” says Mika Rizki Puspaningrum, a vertebrate paleontologist on the Bandung Institute of Know-how in Indonesia who was not concerned with the examine. Most of that is pores and skin, bones and a few inner organs. “This raises an fascinating query about how a lot edible meat would even have remained obtainable for Homo floresiensis to take advantage of,” she says.
If there was any left, the meat was most likely eaten uncooked. Veatch and her colleagues analyzed almost 7,000 rodent skeletal fragments for indicators of burning, as a result of their stays — littering the bottom within the cave — would have been uncovered to the hominids’ fires. However none have been charred.
If the hobbits weren’t killing massive prey and making fires, then they could have advanced from a species that additionally hadn’t developed these expertise, including one other query mark to the ever-changing image of early human evolution.
