Press-Republican

FYI...

October 28, 2013

Ancient skulls suggests one lineage for early human ancestors

SAN FRANCISCO — A "time capsule" from 1.8 million years ago, located in Dmanisi, Georgia, shows variations among five human skulls from that period that suggest long-debated distinctions about early human development may be overblown.

The differences between the skulls were no more than that seen in modern humans, according to a report Thursday in the journal Science. The findings suggest there may have been only one species of early human in a key period of time when they first began to migrate out of Africa, said David Lordkipanidze, an anthropologist at the Georgian National Museum in Tbilisi and the report's author.

The analysis drew immediate criticism from scientists who said other members of the hominid family - Homo erectus, Homo habilis, and Homo rudolfensis - were identified using more than just their skulls. Lordkipanidze said the Dmanisi artifacts offer the earliest known representation outside of Africa of human development after the migration.

"Dmanisi has a uniqueness: it's a real snapshot in time, a time capsule from 1.8 million years ago," he said phone call with reporters.

The site, which sits below the ruins of the medieval town of Dmanisi, in the Mashavera River Valley, was discovered in 1983, when archaeologists studying the medieval town noticed bones of species they knew were extinct. In 1984, ancient stone tools were found there.

One of the five skulls found at the site recently had a small braincase, a long face, and large teeth, features never before seen together, according to the paper in Science. It was discovered with four other crania from the same place and time.

The skull has "a strange combination of features we didn't see before in early Homo," said Marcia S. Ponce de León, a report co-author, of the Anthropological Institute and Museum in Zurich, in a call with reporters. Its location with other contemporary skulls allows the researchers to compare them to each other, she said.

Text Only | Photo Reprints
FYI...
  • Has the ipad lost its swag?

    The numbers are clear: Apple is selling fewer iPads.

    August 1, 2014

  • 130408_NT_BEA_good kids We're raising a generation of timid kids

    A week ago, a woman was charged with leaving her child in the car while she went into a store. Her 11-year-old child. This week, a woman was arrested for allowing her 9-year-old daughter to go to the park alone. Which raises just one question: America, what the heck is wrong with you?

    July 31, 2014 1 Photo

  • 20110929_bowling.jpg Why fewer people go bowling

    Like other industries facing tough economic times, America's bowling centers are trying to reinvent themselves.

    July 30, 2014 1 Photo

  • mama.jpg What we get wrong about millennials living at home

    If the media is to be believed, America is facing a major crisis. "Kids," some age 25, 26, or even 30 years old, are living out of their childhood bedrooms and basements at alarmingly high numbers. The hand-wringing overlooks one problem: It's all overblown.

    July 29, 2014 1 Photo

  • Your chocolate addiction is only going to get more expensive

    For nearly two years, cocoa prices have been on the rise. Finally, that's affecting the price you pay for a bar of chocolate - and there's reason to believe it's only the beginning.

    July 28, 2014

  • Facebook tests button to let people shop from its website

    Members on desktop computers or mobile devices can click a "buy" button to make purchases through advertisements or other posts on the world's largest social network, the Menlo Park, California-based company said Thursday in a blog post.

    July 27, 2014

  • Wal-Mart to cut prices more aggressively in back-to-school push

    Wal-Mart Stores plans to cut prices more aggressively during this year's back-to-school season and will add inventory to its online store as the chain battles retailers for student spending.

    July 26, 2014

  • An oncologist uses scorpion venom to locate cancer cells

    Olson, a pediatric oncologist and research scientist in Seattle, has developed a compound he calls Tumor Paint. When injected into a cancer patient, it seems to light up all the malignant cells so surgeons can easily locate and excise them.

    July 25, 2014

  • An alternative diagnosis to ADHD: Schoolchildren need more time to move

    The Centers for Disease Control and Prevention tells us that in recent years, there has been a jump in the percentage of young people diagnosed with attention deficit and hyperactivity disorder, commonly known as ADHD: 7.8 percent in 2003 to 9.5 percent in 2007 to 11 percent in 2011.

    July 24, 2014

  • Hospitals let patients schedule ER visits

    Three times within a week, 34-year-old Michael Granillo went to the emergency room at Northridge Hospital Medical Center in Los Angeles because of intense back pain. Each time, Granillo, who didn't have insurance, stayed for less than an hour before leaving without being seen by a doctor.

    July 23, 2014