vaata veel
10/30/10
10/29/10
Kas käes on uus toidukriis?
Debora MacKenzie uurib New Scientistis, kas kätte on jõudnud uus, 2008. aasta globaalse toiduhindade tõusu ja nälgivate inimeste hüppelise kasvu olukorraga võrreldav toidukriis.
Not quite. Maximo Torero of the International Food Policy Research Institute (IFPRI) in Washington DC notes that oil, the real driver of food prices and of the 2008 crisis, is relatively cheap, at around $75 a barrel, not over $100 as it was in 2008. In 2008, both immediate grain prices, and the prices offered for future grain purchases in commodities markets, climbed steadily for months, whereas now they are spiking and dipping more unpredictably, which economists call volatility. "The market fundamentals – supply and demand – do not warrant the price increases we have seen," says Torero. Not all harvests have been bad, and after 2008 countries rebuilt grain stocks. "There are enough stocks in the US alone to cover the expected losses in Russia."
Not quite. Maximo Torero of the International Food Policy Research Institute (IFPRI) in Washington DC notes that oil, the real driver of food prices and of the 2008 crisis, is relatively cheap, at around $75 a barrel, not over $100 as it was in 2008. In 2008, both immediate grain prices, and the prices offered for future grain purchases in commodities markets, climbed steadily for months, whereas now they are spiking and dipping more unpredictably, which economists call volatility. "The market fundamentals – supply and demand – do not warrant the price increases we have seen," says Torero. Not all harvests have been bad, and after 2008 countries rebuilt grain stocks. "There are enough stocks in the US alone to cover the expected losses in Russia."
Mida teha oma surnukehaga
Elizabeth Cohen tutvustab CNNis kümmet viisi, kuidas saaks oma keha pärast enese maise teekonna lõppu kasulikult või põnevalt rakendada.
...of course, being on display in a museum isn't everyone's cup of tea. So in the spirit of the season, here are 10 ways you can put your body to use after you die. In many cases, you can do more than one.
...of course, being on display in a museum isn't everyone's cup of tea. So in the spirit of the season, here are 10 ways you can put your body to use after you die. In many cases, you can do more than one.
vaata veelKuumuses treenimimine annab eelise
Emily Sohn tutvustab Discovery Channeli veebisaidil teadustööd, mis näitab, et kuumades oludes treenimine annab vastupidavusalade sportlastele märgatava eelise.
Elite cyclists who regularly worked out in a hot room boosted their performance in cool conditions by as much as 8 percent. Researchers don't yet know if training in the heat will help amateur marathon runners finally beat their personal bests. But the finding is likely to lead to new training techniques for serious athletes who look for any edge they can get over the competition, said lead researcher Santiago Lorenzo, an exercise and environmental physiologist at the Institute for Exercise and Environmental Medicine in Dallas, Tx.
Elite cyclists who regularly worked out in a hot room boosted their performance in cool conditions by as much as 8 percent. Researchers don't yet know if training in the heat will help amateur marathon runners finally beat their personal bests. But the finding is likely to lead to new training techniques for serious athletes who look for any edge they can get over the competition, said lead researcher Santiago Lorenzo, an exercise and environmental physiologist at the Institute for Exercise and Environmental Medicine in Dallas, Tx.
10/28/10
Unenägude salvestamine on võimalik?
Pallab Ghosh kirjutab BBCs, et rühm USA uurijaid on võtnud eesmärgiks inimeste unenägude elektroonilise salvestamise.
Writing in the journal Nature, scientists say they have developed a system capable of recording higher level brain activity. "We would like to read people's dreams," says the lead scientist Dr Moran Cerf. The aim is not to interlope, but to extend our understanding of how and why people dream.
Writing in the journal Nature, scientists say they have developed a system capable of recording higher level brain activity. "We would like to read people's dreams," says the lead scientist Dr Moran Cerf. The aim is not to interlope, but to extend our understanding of how and why people dream.
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