ScienceDaily: Top Science News

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• Powerful tool for genetic engineering
• Pre-industrial rise in greenhouse gases had natural and anthropogenic causes
• Expert assessment: Sea-level rise could exceed one meter in this century
• College students more likely to be lawbreakers if spanked as children
• Archaeologists discover largest, oldest wine cellar in Near East: 3,700 year-old store room held 2,000 liters of strong, sweet wine
• Colossal new predatory dino terrorized early tyrannosaurs

Powerful tool for genetic engineering Posted: 22 Nov 2013 08:27 AM PST Viruses cannot only cause illnesses in humans, they also infect bacteria. Those protect themselves with a kind of "immune system" which -- simply put -- consists of specific sequences in the genetic material of the bacteria and a suitable enzyme. Scientists have now shown that the dual-RNA guided enzyme Cas9 which is involved in the process has developed independently in various strains of bacteria.

Pre-industrial rise in greenhouse gases had natural and anthropogenic causes Posted: 22 Nov 2013 07:39 AM PST For years scientists have intensely argued over whether increases of potent methane gas concentrations in the atmosphere -- from about 5,000 years ago to the start of the industrial revolution -- were triggered by natural causes or human activities. A new study suggests the increase in methane likely was caused by both. A new study, published Friday in the journal Science, suggests the increase in methane likely was caused by both.

Expert assessment: Sea-level rise could exceed one meter in this century Posted: 22 Nov 2013 07:38 AM PST Sea-level rise in this century is likely to be 70-120 centimeters by 2100 if greenhouse-gas emissions are not mitigated, a broad assessment of the most active scientific publishers on that topic has revealed. The 90 experts participating in the survey anticipate a median sea-level rise of 200-300 centimeters by the year 2300 for a scenario with unmitigated emissions.

College students more likely to be lawbreakers if spanked as children Posted: 22 Nov 2013 07:36 AM PST No matter where they live in the world, university students who were spanked as children are more likely to engage in criminal behavior, according to new research. Even young adults whose parents were generally loving and helpful as they were growing up showed higher rates of criminal behavior.

Archaeologists discover largest, oldest wine cellar in Near East: 3,700 year-old store room held 2,000 liters of strong, sweet wine Posted: 22 Nov 2013 05:45 AM PST Archaeologists have unearthed what may be the oldest -- and largest -- ancient wine cellar in the Near East, containing 40 jars, each of which would have held 50 liters of strong, sweet wine.

Colossal new predatory dino terrorized early tyrannosaurs Posted: 22 Nov 2013 05:42 AM PST A new species of carnivorous dinosaur – one of the three largest ever discovered in North America – lived alongside and competed with small-bodied tyrannosaurs 98 million years ago. Siats meekerorum, (pronounced see-atch) was the apex predator of its time.

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