Taxonomy term

dna

Turkey DNA reveals Mesa Verde denizens moved to New Mexico

The Mesa Verde region of southern Colorado was home to as many as 30,000 Puebloans through the middle of the 13th century, until severe drought drove them south into New Mexico, ending the cliff dwellers’ reign. In a new study, researchers have charted this mass migration using mitochondrial DNA from a novel source: turkey bones from the domesticated birds kept by Puebloans in both Mesa Verde and northern New Mexico.

28 Dec 2017

Cretaceous collagen: Can molecular paleontology glean soft tissue from dinosaurs?

In 2005, a team of molecular paleontologists reported the discovery of soft tissue from a 68-million-year-old Tyrannosaurus rex femur. In the decade since that controversial find, evidence has mounted that dinosaur soft tissue — which could help paleontologists answer long-standing questions about dinosaur physiology — can be recovered.
 

16 Oct 2017

First complete DNA sequences from Egyptian mummies

Egyptian mummies provide archaeologists with a tantalizing window into ancient Egyptian culture. And now they are offering up their DNA.

11 Oct 2017

Cave paintings confirm mystery European bison species

Ice-age hunters had an intimate knowledge of the animals they coexisted with — and this familiarity is clearly depicted in paintings on cave walls throughout Europe. Inside a cave in France, scientists recently identified artistic evidence dating to about 17,000 years ago of a previously unknown hybrid species of cattle crossed with bison. The paintings confirm findings from recent genetic studies of fossil bison, the researchers say.

25 Jan 2017

The trouble with turtles: Paleontology at a crossroads

Turtles are the last big vertebrate group to be placed firmly on the tree of life, and the arguments are getting messy. Scientists in three fields in particular — paleontolgy, developmental biology and microbiology/genomics — disagree about how, and from what, turtles may have evolved. 

31 Mar 2014

Toxic tide

In the Gulf of Mexico lurk menacing masses of single-celled organisms known as red tides. Scientists have long known that the potent toxin they produce can kill fish and birds, wreak havoc on the human nervous system and cause wheezing, sneezing and asthma flare-ups. But new research suggests that it can also damage DNA, which could lead to more subtle, longer-term health consequences.

29 Aug 2008