Research at the University of Liverpool has found that periods of rapid fluctuation in temperature coincided with the emergence of the first distant relatives of human beings and the appearance and spread of stone tools.

Dr Matt Grove from the School of Archaeology, Classics and Egyptology reconstructed likely responses of human ancestors to the climate of the past five million years using genetic modelling techniques. When results were mapped against the timeline of human evolution, Dr Grove found that key events coincided with periods of high variability in recorded temperatures.

Dr Grove said: ‘The study confirmed that a major human adaptive radiation – a pattern whereby the number of coexisting species increases rapidly before crashing again to near previous levels – coincided with an extended period of climatic fluctuation. Following the onset of high climatic variability around 2.7 million years ago a number of new species appear in the fossil record, with most disappearing by 1.5 million years ago. The first stone tools appear at around 2.6 million years ago, and doubtless assisted some of these species in responding to the rapidly changing climatic conditions.

‘By 1.5 million years ago we are left with a single human ancestor – Homo erectus. The key […]

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CHICAGO — Crop scientists in the United States, the world’s largest food exporter, are pondering an odd question: could the danger of global warming really be the heat?

For years, as scientists have assembled data on climate change and pointed with concern at melting glaciers and other visible changes in the life-giving water cycle, the impact on seasonal rains and irrigation has worried crop watchers most.

What would breadbaskets like the Midwest, the Central Asian steppes, the north China Plain or Argentine and Brazilian crop lands be like without normal rains or water tables?

Those were seen as longer-term issues of climate change.

But scientists now wonder if a more immediate issue is an unusual rise in day-time and, especially, night-time summer temperatures being seen in crop belts around the world.

Interviews with crop researchers at American universities paint the same picture: high temperatures have already shrunken output of many crops and vegetables.

‘We don’t grow tomatoes in the deep South in the summer. Pollination fails,

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HONOLULU — It could be the first official report of tsunami debris from Japan nearing Hawaii.

A new report coming from a Russian ship have UH researchers changing their predictions. Since the March 11th earthquake and tsunami, researchers have been predicting it would take about two years for the debris from Japan to hit Hawaii’s west-facing beaches.

‘We have a rough estimate of 5 to 20 million tons of debris coming from Japan,

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An Amish splinter group has gone on a crime spree, forcibly cutting the beards off of their rivals. Many religions, including Sikhism, Islam, and sects of Judaism, encourage or require their men to keep beards. Jesus Christ is often depicted with a beard. Why does God like facial hair so much?

Because it’s manly. Although beards appear repeatedly in religious texts, God never explicitly tells us why they’re so holy. In the absence of any divine exposition, many theologians have posited that a hairy face is a symbol of masculinity bestowed upon men by God. St. Clement of Alexandria, who was among the most emphatic proponents of this view, argued: ‘But for one who is a man to comb himself and shave himself with a razor, for the sake of fine effect, to arrange his hair at the looking-glass, to shave his cheeks, pluck hairs out of them, and smooth them, how womanly! And, in truth, unless you saw them naked, you would suppose them to be women.

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Monsanto Co. (MON)’s insect-killing corn is toppling over in northwestern Illinois fields, a sign that rootworms outside of Iowa may have developed resistance to the genetically modified crop, according to one scientist.

Michael Gray, an agricultural entomologist at the University of Illinois in Urbana, said he’s studying whether western corn rootworms collected last month in Henry and Whiteside counties are resistant to an insect-killing protein derived from Bacillus thuringiensis, or Bt, a natural insecticide engineered into Monsanto corn.

The insects were collected in two fields where corn had toppled after roots were eaten by rootworms, Gray said today. Planting Bt corn year after year increases the odds that the bugs will develop resistance to the insecticide, he said. While the symptoms parallel bug resistance that’s been confirmed in Iowa, analysis of the Illinois insects won’t be complete until next year, he said.

‘Whatever is the cause, it is generating a lot of concern.

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