Tag: "stone" at biology news

Climate change plus human pressure caused large mammal extinctions in late Pleistocene

...mmoth kills date from near the first appearance of stone spearheads made by the human Clovis civilization 11,400 years ago. Only mammoths and mastodons have been found with incontrovertible evidence that they were killed by humans in North America, though human artifacts have been found in association with...

New compound could give some types of cancer the one-two punch

...or of pharmacy at Ohio State. "It's like using one stone to kill two birds." Li presented the results on August 22 in Philadelphia at the summer meeting of the American Chemical Society. OSU 111 is a variation on a theme Li and his colleagues created OSU 111 using a known anti-cancer compound, SU-5416, as...

Oldest evidence for processing of wild cereals: starch grains from barley, wheat, on grinding stone

...d by the abundance of seed remains we found on the stone and how the evidence pointed to the processing of ...om the face of a grinding stone. Then, the entire stone is placed in a sonicator, a water bath in which sound waves vibrate the artifact until smaller parti...

Stonehenge study tells pagans and historians it's good to talk

...the 'preservation ethos', regarding such things as stone circles, barrows and iron age forts as artefacts of pre-Christian paganism, and therefore sacred. Access is important to them, but not at the expense of preserving sites for future generations. However, other Druids and pagans, notably groups campaig...

Microbes found in Mayan ruins may deteriorate stone from inside out

...unidentified microbial community inside the porous stone of the Maya ruins in Mexico that may be capable of...or the conservation of Maya ruins as well as other stone objects and structures," says Christopher McNamara, a researcher on the study. McNamara and his coll...

Evidence of nanobacterial-like structures found in human calcified arteries and cardiac valves

...ducted on nanoparticles isolated from human kidney stone using different, but rigorous techniques. They point out that what is recovered from diseased calcified tissue replicates in culture, but that they have not yet been able to identify or label what they have found as nanobacteria described by a unique...

Newfound grasshopper takes to the trees on Konza Prairie

...k-colored female hoppers basking in the sun on the stone wall of the old ranch house at Konza in mid-October 2002. Wright, also an entomologist, subsequently collected five males and females from hackberry tree trunks in October 2003. Melanoplus punctualatus, the Grizzly grasshopper, was fir...

East African artifacts support evolution of symbolic thinking in Middle Stone Age

...te. This conclusion results from the fact that the stone tools are all Middle Stone Age and the sedimentological analysis of the site by Vondra indicates that is it unlikely that LSA beads could have contaminated the MSA deposits. "I'm fairly sure that these items are very old, and if that is so this cou...

Researchers say US military accidentally introduced tree pathogen to Italian estate

...80s, the root fungus has wiped out large swaths of stone pine trees in the Castelporziano estate less than ...taff started noticing symptoms of infection in the stone pines. They did not know what was causing the die-off at the time, but the disease spread quickly, k...

Isolated corals reefs are at risk from global climate change

...g larval connections. This may occur in a stepping stone fashion between adjacent reefs. In contrast they found that at Lord Howe Island 700 km south and the southernmost Pacific Ocean Reef, corals have little of the genetic diversity needed to respond to change and appear to have no current connection to...

USGS March science picks

...isten to the Irish legend or USGS geologists. The stone is part of Blarney Castle, located in the southern part of Ireland, about five miles northwest of the town of Cork. Legend says that kissing the Blarney Stone bestows the gift of blarney, or sweet flattering talk. USGS geologists will tell you that...

Endurance of plants under quartz rocks possible model for life on early Earth, Mars

...m edges where sunlight could penetrate through the stone at an oblique angle. By placing heat sensors above and below some of the pebbles in all four seasons, the scientists documented that living under the quartz pebbles kept the plants warmer in winter and cooler in summer compared to conditions undernea...

Shyness can be deadly

...ess response is the equivalent of waves striking a stone on the beach," Cole said. "One wave won't do much ... constant pounding of waves eventually grinds that stone to sand. That's how continual stress response wears down the immune system." Previously the UCLA tea...

Bones from French cave show Neanderthals, Cro-Magnon hunted same prey

...n 40,000 and 35,000 years ago, people began making stone tools in France, including at Grotte XVI, that were more like those later fashioned by Cro-Magnon. However, human remains found with these tools at several sites, were Neanderthal, not Cro-Magnon. Similar tools but no human remains from this time pe...

Melbourne scientist overturns 30 year calcium dogma

...its exact role is proving hard to pin down. Every stone we turn over tells us it is an extremely important protein," Most of Hubbard's research was done with the University of Otago, New Zealand. Hubbard's team first reported the new protein in 1997. Prof Hubbard was appointed as Professorial Fellow, Ora...

160,000-year-old fossilized skulls from Ethiopia are oldest modern humans

...viduals, hippopotamus bones bearing cut marks from stone tools, and more than 600 stone tools, including hand axes. All are from the same sediments and, thus, the same era. "These were peo...

Tips from the Journals of the American Society for Microbiology

...ntified a strain of bacteria that may help protect stone monuments and statues from pollution-induced erosi...ental Microbiology. "Architectural and sculptural stone undergoes deterioration due to physical, chemical and/or biological weathering. The composition and...

Rutgers' Tanzanian fossil reshuffles the deck on early human ancestry

...e in prehistory a time when we first began to see stone tools, when hominids had just begun to exploit lar...e species - Homo habilis." OH 65 was found with stone tools and with bones from larger animals that clearly show cut marks made by stone knives and hammer...

New age for Mungo Man, new human history

...ation of the Lake Mungo region has been dated from stone tools at about 50,000 years. This is consistent with the oldest artifacts found in Western Australia and Northern Territory. "Evidence for occupation at 60,000 years or greater remains to be established," says Bowler. "Lake Mungo confirms that the...

Corals defy species classification

...y of Groningen has discovered that four species of stone corals differ so little in terms of their genetic material that they can scarcely be termed separate species. Corals are formed by a collection of identical coral polyps which together form a coral colony. Onno Diekmann compared the genetic material ...

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