Wednesday, December 4, 2013
Tuesday, December 3, 2013
fastest rate of genetic evolution among vertebrates with the strongest changed genes involving body shape, metabolism and venom production.
Monday, December 2, 2013
learned behavior being passed on trans-generationally to a degree in the mice's pups, who express a sensitivity to the same stimulus although never before having encountered the odor.
Friday, November 15, 2013
string and cordage may have been known and used by Neanderthals before the arrival of Homo sapiens in Europe.
Thursday, November 14, 2013
less than liquid water, challenging present planetary formation theories.
Thursday, November 7, 2013
true multicellular organism, compressing the hundreds of millions of years of evolution of multicellular life into a sufficiently short timeframe for real-time study.
Wednesday, November 6, 2013
two spacecraft clean rooms in Florida and South Africa, a bacteria so different from known species it has been classified with a new genus.
Tuesday, November 5, 2013
likeness was captured in sketches by Rembrandt in 1637.
Friday, November 1, 2013
still growing at the time of their death and that the adult animals were more massive and bulkier than current remains suggest.
Thursday, October 24, 2013
bees almost disappeared with the mass extinction event that ended the dinosaurs 65 million years ago, possibly related to the mass extinction of flowering plants that occurred at the same time.
Wednesday, October 23, 2013
venomous crustacean, Speleonectes tulumensis, a tiny, pale, cave-dwelling member of the remipedes group native to Central America that uses its venom to paralyze and partially digest small shrimp.
Tuesday, October 22, 2013
gold particles in the leaves of gum trees (Eucalyptus spp.) in Australia, with the trees acting as hydraulic pumps to draw the metals from underground sources and providing a possible new method for identifying mineral deposits.
Monday, October 21, 2013
undergo menopause as they age, along with humans and pilot whales one of only three species known to do so, living 50 to 60 years past their reproductive age presumably as an evolutionary advantage to increase the survival rates of young males and their offspring.
Friday, October 18, 2013
entire skull of a Homo erectus dating back some 1.8 million years in Georgia, the earliest complete specimen yet found and so perfectly preserved it suggests the human ancestor was more variable in appearance than previously believed with several classified subspecies such as H. habilis and H. rudolfensis simply belonging to this single species.
Thursday, October 17, 2013
steep 45-degree angle relative to the stellar equator, the gas giant Kepler-56 about 2800 light years distant.
Wednesday, September 18, 2013
removes the instinctive fear of predators (cats) in rodents, possibly permanently modifying a specific brain function as an evolutionary adaptation for the parasite, which can only reproduce sexually within the cat gut.
Tuesday, September 17, 2013
weak force, one of the four fundamental forces described in the Standard Model, for the proton, the neutron, and the up and down quarks.
Thursday, September 12, 2013
naturally occurring gear mechanism in the hind leg joint structure of the plant hopper (Issus coleoptratus) featuring interlocking cog teeth that ensure a coordinated thrust when the insect jumps with a mechanical synchronization beyond what is capable with the nervous system.
Saturday, September 7, 2013
biological concept of exaptation, an evolutionary phenomenon introduced in 1982 by Stephen Jay Gould and Elisabeth Vrba as a counterpart to adaptation by which existing traits are co-opted for new and advantageous uses unrelated to their biological origin.
Friday, September 6, 2013
volcanic surfacing in Earth's mantle using new models similar to computerized tomography (CT) scans of the human body.
Thursday, September 5, 2013
convergent evolution of similar anatomical and functional features such as sight and echolocation across unrelated species is more widespread at the molecular level than previously thought.
Wednesday, September 4, 2013
Egypt's first state dynasty with King Aha about 3100 B.C.
Tuesday, September 3, 2013
asteroid impact near modern-day Quebec about 12,900 years ago, corresponding to archaeological global climate cooling and the most recent ice age known as the Younger Dryas.
Wednesday, August 28, 2013
atomic number 115, informally referred to by the unofficial name ununpentium but to be formally named later by a committee from the International Union of Pure and Applied Chemistry (IUPAC).
Friday, August 16, 2013
left the solar system (actually crossing over last summer) based on the disappearance of solar particle counts even though the local magnetic field has not changed, describing the irregular and ill-defined boundary as a "heliosheath depletion region."
Thursday, August 15, 2013
unknown species of carnivorous mammal, the olinguito (Bassaricyon neblina), living in the cloud forests of Colombia and Ecuador, an extremely rare discovery as a new member of the family Procyonidae and order Carnivora.
Friday, August 9, 2013
Moche priestess-queen who was buried about A.D. 750 at San José de Moro in the Jequetepeque River valley of northern Peru, the eighth such elite female burial found at the site since 1991 and supporting the theory of an ancient female-ruled society.
Thursday, August 8, 2013
period of Australia's transition from a tropical to an arid climate.
Wednesday, July 24, 2013
unusually shaped backbone of 10 to 11 interlocking vertebrae unique in the mammalian world, providing the animal with extraordinary and disproportionate structural strength for reasons yet unknown.
Tuesday, July 23, 2013
unique signature whistle that they respond to by repeating that whistle back to the originator, ignoring other similar vocalizations and supporting evidence of a concept of identity with a distinct "name" for each individual animal.
Monday, July 22, 2013
evidence of land-based life on Earth, pushing back estimates of its first appearance from 500 million years to 2.2 billion years ago.
Saturday, July 20, 2013
megaviruses (Pandoravirus) seemingly found everywhere and of unknown function or effect, some a thousand times larger than a flu virus and with 200 times as many genes with only 6% of those genes known to science.
Friday, July 19, 2013
Tuesday, July 16, 2013
retained their memories of the task after their head had regrown, implying that memory may be stored in other body cells and then imprinted in the new brain as it regenerates.
Saturday, July 13, 2013
physical limit to the resolution possible with the technology.
Friday, July 12, 2013
aware of being watched by other crickets, the first time such social behavior has been observed in invertebrates and revealing an unexpected depth of learning and memory in insects.
Thursday, July 11, 2013
survive in sub-freezing waters of -1.9 degrees Celsius.
Wednesday, July 10, 2013
optical lattice atomic clock that is three times more accurate than current atomic clocks, measuring oscillations from strontium atoms excited by a laser rather than microwave-based cesium fountains with an accuracy of losing only one second every 300 million years.
Tuesday, July 9, 2013
Bald Cypress forest at least 0.8 km long off the coast of Alabama, freshly preserved for at least 52,000 years under ocean sediment in an oxygen-free environment in the Gulf of Mexico and most likely uncovered by Hurricane Katrina in 2005.
Monday, July 8, 2013
powerful fast radio bursts (FRB) of unknown origin outside the Milky Way galaxy and billions of light-years away, each lasting only a few milliseconds yet giving off more energy than does our Sun in 300,000 years.
Tuesday, July 2, 2013
Saturday, June 29, 2013
circle the Earth twice, as measured by an International Monitoring System designed to detect ultra-low frequency acoustic waves (infrasound) from nuclear tests.
Wednesday, June 26, 2013
Saturday, June 22, 2013
respond to circadian cycles up to about a week after harvest, adapting their internal levels of nutrients and protective chemical compounds in response to predator cycles.
Friday, June 21, 2013
tetraquark particle designated Zc(3900), the strongest evidence yet for matter consisting of more than three quarks.
Thursday, June 20, 2013
lost Mayan city of Chactun hidden in the thick jungle of the Yucatan, a 22-hectare site that includes 15 pyramids and ball game courts and may have been home to as many as 40,000 people before being abandoned around 1000 A.D.
Wednesday, June 19, 2013
new subduction zone, splitting the plate into oceanic and continental sections that will cause the Atlantic Ocean to disappear in about 220 million years as Europe and North American drift toward one another.
Tuesday, June 18, 2013
planned urban network of roadways and canals linking the 1200-year-old temples of the Angkor Wat complex hidden under dense vegetation.
Friday, June 14, 2013
Researchers have found a previously unknown and distinct tough sixth layer (named the Dua's layer after its discoverer) in the cornea of the human eye, located at the back of the cornea with a thickness of only about 15 microns.
Thursday, June 13, 2013
neck and abdominal muscles of rare, well-preserved 380 million-year-old early jawed fish (placoderm) fossils from the Gogo Formation of northwestern Australia using high-contrast x-ray beams to image the soft-tissue impressions without damage to the fossil.