Science & Technology
Ever wondered why sleeping on a problem works? It seems that as well as strengthening our memories, sleep also helps us to extract themes and rules from the masses of information we soak up during the day.
That's the conclusion of research by University of Leeds exercise physiologist Dr Harry Rossiter.
Dr Rossiter measured the metabolic rates of modern athletes rowing a reconstruction of an Athenian trireme, a 37m long warship powered by 170 rowers seated in three tiers.
Using portable metabolic analysers, he measured the energy consumption of a sample of the athletes powering the ship over a range of different speeds to estimate the efficiency of the human engine of the warship.
By comparing these findings to classical texts that record details of their endurance, he realised that the rowers of ancient Athens - around 500BC - would had to have been highly elite athletes, even by modern day standards.
Dr Rossiter measured the metabolic rates of modern athletes rowing a reconstruction of an Athenian trireme, a 37m long warship powered by 170 rowers seated in three tiers.
Using portable metabolic analysers, he measured the energy consumption of a sample of the athletes powering the ship over a range of different speeds to estimate the efficiency of the human engine of the warship.
By comparing these findings to classical texts that record details of their endurance, he realised that the rowers of ancient Athens - around 500BC - would had to have been highly elite athletes, even by modern day standards.
THE survival techniques of West African chimpanzees have revealed that the first human weapons may have been developed by women.
The use of spears and axes to hunt and kill is commonly thought to have been pioneered among humanity's ancestors by males, but research has indicated weapons may have been a female invention that compensated for their lesser size and strength.
The use of spears and axes to hunt and kill is commonly thought to have been pioneered among humanity's ancestors by males, but research has indicated weapons may have been a female invention that compensated for their lesser size and strength.
NASA's Spitzer Space Telescope has captured for the first time enough light from planets outside the solar system, known as exoplanets, to identify signatures of molecules in their atmospheres, NASA announced Wednesday.
The landmark achievement is a significant step toward being able to detect life on rocky exoplanets and comes years before astronomers had anticipated.
The landmark achievement is a significant step toward being able to detect life on rocky exoplanets and comes years before astronomers had anticipated.
Half of all human languages will have disappeared by the end of the century, as smaller societies are assimilated into national and global cultures, scientists have warned.
Losing this linguistic diversity will be a blow not only for cultural studies but also for cognitive science, they say. The only option is to record and catalogue these languages before they disappear for good, say the researchers, who gathered at the American Association for the Advancement of Science in Seattle, Washington, to issue the warning.
Some 6800 "unique" languages are thought to exist today. But social, demographic and political factors are all contributing to the rapid disappearance of many mother tongues.
Losing this linguistic diversity will be a blow not only for cultural studies but also for cognitive science, they say. The only option is to record and catalogue these languages before they disappear for good, say the researchers, who gathered at the American Association for the Advancement of Science in Seattle, Washington, to issue the warning.
Some 6800 "unique" languages are thought to exist today. But social, demographic and political factors are all contributing to the rapid disappearance of many mother tongues.
The strange behaviour of a magnet near absolute zero temperature provides the first direct evidence that some quantum phase transitions proceed very differently than the conventional phase transitions that occur at higher temperatures. Researchers in Germany applied a magnetic field to a metallic compound and watched it transform from a magnet to a non-magnet -- just as expected. The surprise came at higher field strengths, where a puzzling change in the character of the metal was observed. As the temperature was lowered both the magnetic phase transition and the mysterious change converged on the same magnetic field value -- the "quantum critical point" -- defying the conventional method of characterizing phase transitions in terms of a single "universality class".
Relatively calm weather was the standard forecast for the sun, which is near the end of another 11-year solar cycle, but raging solar storms just spotted at its south pole now tell a different story.
At the start of a solar cycle, sunspots - regions on the sun marked by cooler temperatures and intense magnetic activity - tend to appear near the poles and move toward the equator as the cycle concludes.
At the start of a solar cycle, sunspots - regions on the sun marked by cooler temperatures and intense magnetic activity - tend to appear near the poles and move toward the equator as the cycle concludes.
A group of construction workers stumbled upon 46 ancient tombs, between 1,500 and 2,500 years old while digging to build a new soccer stadium in Deportivo Cali in southwestern Colombia, an archaeologist team said on Wednesday.
For the first time, telescopes have captured the light spectra emitted directly from planets outside of our solar system. Researchers trained the infrared-sensitive Spitzer Space Telescope on two extrasolar gas giant planets, called HD 209458 b and HD 189733 b.
Seminole --- A 16-year-old high school student stumbled upon what archaeologists say could be the biggest fossil find in Pinellas County in nearly a century.
