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Mon, 05 Oct 2015 18:46:38 EDT
Where to look for life? Astronomers devise 'habitability index' to guide future search
Astronomers have created a way to compare and rank exoplanets to help prioritize which of the thousands discovered warrant close inspection in the search for life beyond Earth.
Mon, 05 Oct 2015 15:15:09 EDT
Packaged food purchases at non-grocery stores are up but nutritional quality is down
Consumers are increasingly buying food from mass merchandisers, warehouse clubs, and convenience stores, but are selecting foods with poor nutritional profiles, according to new study.
Mon, 05 Oct 2015 15:14:19 EDT
Ancient alga knew how to survive on land before it left water and evolved into the first plant
A team of scientists has solved a long-running mystery about the first stages of plant life on earth.
Mon, 05 Oct 2015 15:14:17 EDT
Bacteria in the world’s oceans produce millions of tons of hydrocarbons each year
Scientists have calculated that millions of tons of hydrocarbons are produced annually by photosynthetic bacteria in the world's oceans.
Mon, 05 Oct 2015 13:29:01 EDT
Cryptic invasions by ecological engineers conceal profound changes in nature
A new study reveals that the salt marsh plant Spartina alterniflora, which grows on more than 9,000 km of the Atlantic coastline of South America, is not native to the area and was in fact introduced 200 years ago.
Mon, 05 Oct 2015 13:28:54 EDT
Simpler way to estimate feedback between permafrost carbon, climate
A simple model of permafrost carbon based on direct observations has been developed by a team of scientists. Their approach could help climate scientists evaluate how well permafrost dynamics are represented in Earth system models used to predict climate change.
Mon, 05 Oct 2015 13:28:51 EDT
Efficiency from larger perovskite solar cells improved
Perovskite solar cells are cheaper to make than traditional silicon cells and their electricity conversion efficiency is improving rapidly. To be commercially viable, perovskite cells need to scale up from lab size. Researchers report a method for making perovskite cells larger while maintaining efficiency.
Mon, 05 Oct 2015 13:27:34 EDT
True colors: Using molecular analysis to clarify dino color claims
How do we know that the melanosomes found in the fossils are actually melanosomes and not something else, like leftover impressions from the microbes (some of which also make melanin) that coated the feather during its decay and preservation?
Mon, 05 Oct 2015 13:27:31 EDT
Big range of behaviors for tiny graphene pores
Researchers have created tiny pores in single sheets of graphene that have an array of preferences and characteristics similar to those of ion channels in living cells.
Mon, 05 Oct 2015 13:26:21 EDT
Happy head, happy heart: Positive emotions may promote heart-healthy behaviors
People with heart disease may benefit from maintaining positive emotions, according to health researchers. The researchers assessed psychological well-being of participants at baseline and again at a five-year follow-up by asking the participants to rate the extent that they had felt 10 specified positive emotions, including "interested," "proud," "enthusiastic" and "inspired." Physical activity, sleep quality, medication adherence and alcohol and cigarette use were also measured at baseline and again five years later.
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