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March 04, 2013

Toxic oceans may have delayed spread of complex life
Exeter UK (SPX) Mar 04, 2013
A new model suggests that inhospitable hydrodgen-sulphide rich waters could have delayed the spread of complex life forms in ancient oceans. The research, published online this week in the journal Nature Communications, considers the composition of the oceans 550-700 million years ago and shows that oxygen-poor toxic conditions, which may have delayed the establishment of complex life, were controlled by the biological availability of nitrogen. In contrast to modern oceans, data from ancient rocks ... read more

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Additional Details on the Large Fireball Event over Russia on Feb. 15, 2013 The large fireball (technically, a "superbolide") observed on the morning of February 15, 2013 in the skies near Chelyabinsk, Russia, was caused by a relatively small asteroid approximately 17 to 20 ... more		How did early primordial cells evolve Four billion years ago, soon after the planet cooled enough for life to begin, primordial cells may have replicated and divided without protein machinery or cell walls, relying instead on just a fli ... more		Low Stray Light Ellipsoidal Mirror Helps Push the Boundaries of Solar Research Optical Surfaces Ltd. has supplied a 350mm diameter on-axis ellipsoidal mirror to the Kiepenheuer-Institut fur Sonnenphysik (KIS) in Freiberg, Germany. The Kiepenheuer-Institut fur Sonnenphysi ... more
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