Helps trigger mechanism that kills bacteria
Study finds healthier eating can turn off the risk gene
Effect lingers even after men stop taking popular supplement
Fossils show primitive and modern traits
Soot second only to carbon dioxide when it comes to global warming emissions
Public less certain that humans cause climate change
Forecasts can help mitigate human Crisis
John Davis campaigns for system of connected, protected wildlife habitats
Invention reduces dependence on batteries
First documented case of human pathogen infecting a marine species
New rule is a breath of fresh air for downwind states
Expects accelerated thawing to continue unless greenhouse-gas emissions are reduced
Space agency awards grants to explore next generation of US space program
US Botanic Garden houses more than 10,000 plants
Sharp decline upsets balance of the world’s ecosystems
Capacity to take up the carbon humans put in the atmosphere is waning
Environmentalists push for tighter regulations
Channel opens between Pacific and Atlantic
Overwhelmed by the heavy workload and focus on college prep
Some non-native species are harmless, but others wreak havoc on other species, human health and the economy
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