Our spines don’t start out as bone. In the embryos of vertebrates, the spine begins as a rod with a core of fluid-filled sacks. This structure is called the “notochord” and provides a flexible scaffold for the trunk and a mold for the spine.
Shotgun marriages have faded in popularity overall, but are on the rise among some groups, says new research from Duke University. And not all shotgun marriages are as rocky as one might think.
To untangle the links between guts and brains, some scientists are starting small: with the tiny transparent worm C. Elegans, whose guts glow green and neurons glow orange in this composite illustration and microscope image.
When it comes to bright colors and bold patterns, the fashion industry can’t hold a candle to butterflies.
Their wings come in a dizzying array of designs and hues, from the iridescent blue bands of the morpho butterfly and the red dots of the ruby-spotted swallowtail, to the orange, black and white warning colors of the monarch.
A new study could explain why DNA and not RNA, its older chemical cousin, is the main repository of genetic information. The DNA double helix is a more forgiving molecule that can contort itself into different shapes to absorb chemical damage to the basic building blocks -- A, G, C and T -- of genetic code. In contrast, when RNA is in the form of a double helix it is so rigid and unyielding that rather than accommodating damaged bases, it falls apart completely.
The jaws of trap-jaw ants can generate forces hundreds of times their body weight and snap shut at speeds reaching 145 miles per hour -- over 2,000 times faster than the blink of an eye.
It takes a well-trained eye to spot an irregular heartbeat in the peaks and valleys of an electrocardiogram. The same goes for identifying an extinct ape from a single fossilized tooth, or telling an original van Gogh from a fake.
But in recent years, applied mathematician Ingrid Daubechies has been training computers to churn through ECG tracings, high-resolution scans of fossils, paintings and other complex digital data and work things out automatically.
DURHAM, N.C. – A legacy of acid rain has acidified forest soils throughout the northeastern United States, lowering the growth rate of trees. In an attempt to mitigate this trend, in 1999 scientists added calcium to an experimental forest in New Hampshire; tree growth recovered, but a decade later there was a major increase in the nitrogen content of stream water draining the site.
The green ring of cells lining this fruit fly’s digestive tract normally lie dormant, but after injury they spring into action, growing and copying their DNA to help the fly’s gut heal. To repair damage, organs either make new cells to replace those that were lost, or enlarge the cells that remain.
Researchers from Duke University and UNC-Chapel Hill are testing the ability of drones to detect sharks in coastal waterways.
In a collaborative study funded by North Carolina Aquariums, the researchers are examining whether drones can effectively pinpoint bonnethead sharks in different habitats and water conditions.