News
- Tech
Speed Bump: Tip’s tricks sort DNA, write at nanoscale
An atomic-force microscope tip has been transformed into a microinstrument for sorting DNA and depositing nanostructures by means of cleverly applied voltages that propel molecules along the tip's surface.
- Humans
Legal Debate: Assumptions on medical malpractice called into question
The notion that many medical-practice lawsuits are frivolous and intended to generate undeserved riches for their plaintiffs and lawyers isn't borne out in a new study.
- Anthropology
Making sacrifices in Stone Age societies
A half-dozen burials at sites in Europe and western Asia dating to between 27,000 and 23,000 years ago provide clues to possible human sacrifices.
- Anthropology
Digging up debate in a French cave
A scientific debate has broken out over whether a French cave excavated more than 50 years ago contains evidence of separate Stone Age occupations by Neandertals and modern humans.
- Anthropology
Neandertals take out their small blades
Excavations of Neandertal artifacts have yielded a trove of thin, double-edged stone blades that researchers usually regard as the work of Stone Age people who lived much later.
- Anthropology
Ancient islanders get a leg up
A new analysis of bones from a tiny evolutionary cousin of people found on a Pacific island indicates that these late Stone Age individuals carried a lot of weight on short frames and had extremely strong legs.
- Health & Medicine
An aging protein?
The defective protein that, when defective, causes a premature-aging disease may also play a role in normal aging.
- Astronomy
Crust on a star
By analyzing X rays generated by the rumblings of a neutron star 40,000 light-years from Earth, astronomers have estimated the thickness of the dense star's crust.
-
Blood Sucker: Like the adult heart, the developing heart takes advantage of suction
The embryonic heart works more like the adult heart than scientists had long assumed.
- Health & Medicine
Defending against a Deadly Foe: Vaccine forestalls fearsome virus
A single injection of an experimental vaccine prevents infection by the lethal Marburg virus in monkeys.
- Astronomy
Big Breakup: That’s the way the comet crumbles
Scores of telescopes are watching the continuing breakup of a comet as it nears the sun.
-
Boyish Brains: Plastic chemical alters behavior of female mice
Exposure to the main ingredient of polycarbonate plastics can alter brain formation in female mouse fetuses and make the lab animals, later in life, display a typically male behavior pattern.
