ScienceDaily: Top Environment News |
- Eating poisonous plants saves life of gemsbok in Namibian desert
- Female frogs prefer males who can multitask
- Cell biology: A protein provides stress relief
- How females choose the 'right' sperm
- Developmental on-switch: Substances that convert body cells back into stem cells initially activate all genes in the embryo
- Global pliocene cooling digs deep canyons into the Andean plateau
- Feeding RNAs to a molecular shredder: Scientists unravel the structure of a regulatory protein complex in RNA disposal
- Do herbicides alter ecosystems around the world? Scant research makes it hard to prove
- Fossil of history's most successful mammal: Prehistoric 'rodent' may have set the stage for life in trees, herbivorous diets
- Bacteria commonly found in drinking water creates conditions which enable other -- potentially harmful -- bacteria to thrive
- One-pot to prep biomass for biofuels
- The Shakespeare code: English professor confirms The Bard's hand in 'The Spanish Tragedy'
| Eating poisonous plants saves life of gemsbok in Namibian desert Posted: 16 Aug 2013 07:27 PM PDT In drought periods browsing springbok feed on all plant material they can find, while grazing gemsbok, in contrast, switch their diet to a high proportion of poisonous plants -- and they survive.  |
| Female frogs prefer males who can multitask Posted: 16 Aug 2013 10:03 AM PDT In a study of gray tree frogs, researchers discovered that females prefer males whose calls reflect the ability to multitask effectively.  |
| Cell biology: A protein provides stress relief Posted: 16 Aug 2013 09:56 AM PDT Astrin prevents cells from overreacting to stress and averts their premature death, new research shows. Researchers have shown a new mechanism via which cells defend themselves against stress.  |
| How females choose the 'right' sperm Posted: 16 Aug 2013 06:48 AM PDT Scientists have revealed how females select the 'right' sperm to fertilize their eggs when faced with the risk of being fertilized by wrong sperm from a different species. Researchers investigated salmon and trout. They found that when eggs from each species are presented with either salmon or trout, they allow fertilization by either species' sperm. But if eggs are given a choice of both species' sperm, they favor their own species'.  |
| Posted: 16 Aug 2013 06:47 AM PDT Researchers have demonstrated for the first time why the molecular cocktail responsible for generating stem cells works. Sox2 and Oct4 are proteins whose effect on cells resembles that of an eraser: They remove all of the cell's previous experiences and transform it into a so-called pluripotent stem cell. Like cells in the embryo, this stem cell can then develop into all forms of tissue.  |
| Global pliocene cooling digs deep canyons into the Andean plateau Posted: 16 Aug 2013 06:46 AM PDT Incision of canyons into mountains is often interpreted by geoscientists as a proxy for surface uplift of the surroundings by geodynamic and tectonic processes. However, another possible cause for incision is climate change. Scientists have analyzed the developmental history of a series of 1.5 to 2.5 kilometer deep canyons along a 1250 kilometer portion of the Eastern margin of the Andean Plateau, South America (Peru and Bolivia). They found that Miocene faulting and mountain building of the Northeastern Plateau margin initiated at or before 20 million years ago at the Rio San Gaban catchment, Peru, and was then followed by Pliocene incision of the canyons 4 to 3 million years before present. At the same time as this incision, early global Pliocene warmth shifted to a late Pliocene cooling.  |
| Posted: 16 Aug 2013 06:46 AM PDT Any errors that occur during the synthesis of RNA molecules or unwanted accumulation of RNAs can be harmful for the cell. The elimination of defective RNAs or of RNAs that are no longer needed is therefore a key step in the metabolism of a cell.  |
| Do herbicides alter ecosystems around the world? Scant research makes it hard to prove Posted: 16 Aug 2013 06:46 AM PDT The number of humans on the planet has almost doubled in the past 50 years -- and so has global food production. As a result, the use of pesticides and their effect on humans, animals and plants have become more important. Many laboratory studies have shown that pesticides can harm organisms which they were not meant to affect. Intensive farming is also linked to collapsing populations of wild animals and the endangerment of species such as amphibians. Can the biochemical effects of pesticides upset entire ecosystems?  |
| Posted: 15 Aug 2013 11:51 AM PDT The 160-million-year-old fossil of an extinct rodent-like creature from China is helping to explain how multituberculates -- the most evolutionarily successful and long-lived mammalian lineage in the fossil record -- achieved their dominance.  |
| Posted: 14 Aug 2013 09:43 AM PDT Bacteria commonly found in drinking water creates conditions which enable other -- potentially harmful -- bacteria to thrive.  |
| One-pot to prep biomass for biofuels Posted: 14 Aug 2013 07:14 AM PDT Researchers save water and reduce pollution with the first one-pot, wash-free, process for the ionic liquid pretreatment and saccharification of switchgrass, one of the leading biofuel feedstock candidates.  |
| The Shakespeare code: English professor confirms The Bard's hand in 'The Spanish Tragedy' Posted: 14 Aug 2013 06:56 AM PDT An English Professor confirms Shakespeare authored 325 additional lines in "The Spanish Tragedy."  |
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