ScienceDaily: Top Science News

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• Global precipitation linked to global warming
• Bacteria may allow animals to send quick, voluminous messages
• Fast-mutating DNA sequences shape early development; Guided evolution of uniquely human traits
• Single-cell genome sequencing gets better
• New supernova: Hubble catches stellar explosions

Global precipitation linked to global warming Posted: 11 Nov 2013 03:55 PM PST A new study shows that observed changes in global (ocean and land) precipitation are directly affected by human activities and cannot be explained by natural variability alone.

Bacteria may allow animals to send quick, voluminous messages Posted: 11 Nov 2013 01:15 PM PST Twitter clips human thoughts to a mere 140 characters. Animals' scent posts may be equally as short, relatively speaking, yet they convey an encyclopedia of information about the animals that left them. Researcher now show that the detailed scent posts of hyenas are, in part, products of symbiotic bacteria, microbes that have a mutually beneficial relationship with their hosts.

Fast-mutating DNA sequences shape early development; Guided evolution of uniquely human traits Posted: 10 Nov 2013 05:44 PM PST What does it mean to be human? According to scientists the key lies, ultimately, in the billions of lines of genetic code that comprise the human genome. The problem, however, has been deciphering that code. But now, researchers have discovered how the activation of specific stretches of DNA control the development of uniquely human characteristics -- and tell an intriguing story about the evolution of our species.

Single-cell genome sequencing gets better Posted: 10 Nov 2013 03:44 PM PST Researchers have generated the most complete genome sequences from single E. coli cells and individual neurons from the human brain. Preliminary data suggest that individual neurons from the same brain have different genetic compositions. The breakthrough comes from a new single-cell genome sequencing technique that confines genome amplification to fluid-filled wells with a volume of just 12 nanoliters.

New supernova: Hubble catches stellar explosions Posted: 09 Nov 2013 12:39 PM PST Supernovae are intensely bright objects. They are formed when a star reaches the end of its life with a dramatic explosion, expelling most of its material out into space. Another star has now exploded, forming supernova SN 2013ek.

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