ScienceDaily: Top Science News |
- First animals oxygenated the ocean
- Four new human-made ozone depleting gases found in the atmosphere
- Sun's energy influences 1,000 years of natural climate variability in North Atlantic
| First animals oxygenated the ocean Posted: 09 Mar 2014 12:05 PM PDT The evolution of the first animals may have oxygenated the earth's oceans -- contrary to the traditional view that a rise in oxygen triggered their development. New research contests the long held belief that oxygenation of the atmosphere and oceans was a pre-requisite for the evolution of complex life forms. The study builds on the recent work of scientists in Denmark who found that sponges -- the first animals to evolve -- require only small amounts of oxygen.  |
| Four new human-made ozone depleting gases found in the atmosphere Posted: 09 Mar 2014 12:05 PM PDT New research reveals that four new human-made gases have been discovered in the atmosphere. 74,000 tons of these new CFCs and HCFCs are all contributing to the destruction of the ozone layer. Emission increases of this scale have not been seen for any other CFCs since controls were introduced during the 1990s.  |
| Sun's energy influences 1,000 years of natural climate variability in North Atlantic Posted: 09 Mar 2014 12:04 PM PDT Changes in the sun's energy output may have led to marked natural climate change in Europe over the last 1000 years, according to researchers. The study found that changes in the Sun's activity can have a considerable impact on the ocean-atmospheric dynamics in the North Atlantic, with potential effects on regional climate.  |
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