'Walden,' published in 1854, is a manual for solitude with a purpose.
The value that bats provide to humans by pollinating crops and eating insects is far greater than harm from virus transmission – which is mainly caused by human actions.
You won't see a blue shark near the beach, but thanks to 50 years of tagging data, scientists are learning about their wide-ranging lives at sea.
Water is essential for health, economic well-being and social equity, but too many people around the world still don't have access to clean drinking water and sanitation.
Releasing balloons at weddings and other celebrations is festive, until they break into pieces and become plastic pollution. A citizen science project is spotlighting the problem.
Most commercial hand sanitizers are mainly alcohol, but forget about hitting the liquor store and mixing your own.
A new study estimates that mangroves prevent over $65 billion in damage from coastal storms every year, and says mangrove protection should be funded in the same way as infrastructure like seawalls.
Insect populations are falling as what they eat becomes more like iceberg lettuce and less like kale.
A new study finds 70% of Amazonian dung beetles were killed by the severe fire and droughts of 2015 to 2016. By spreading seeds and poop, dung beetles fertilize forests and aid regrowth of vegetation.
Declaring an issue is a national emergency lets presidents act quickly and with few constraints. But once they get this kind of power, it's hard to take it back – and it can produce bad policies.
In the Southeast US, tornadoes strike at night more often than in other regions. This poses special challenges for getting early warnings to the public.
Climate change has advanced the arrival of spring by as much as several weeks in some parts of the US. This can mean major crop losses and disconnects between species that need each other to thrive.
Millions of Americans feed wild birds, especially in winter and spring. Studies show that this can influence birds' health and behavior in surprising ways.
Native Brazilians are among the Amazon's most effective defenders against logging and mining, because they're fighting not just for the environment but for their people's very survival.
Climate change, globalization and concerns about rat poison soon could drive rat infestations to levels not seen in centuries. One way to curb them is getting humans to stop wasting food.
Dams built to hold enormous quantities of toxic mining waste have a long history of spills. Decisions in the Pacific Northwest threaten three free-flowing rivers there.
A new study takes an innovative approach to reducing fine particle air pollution and spotlights key sources: factories that burn coal and oil, petrochemical plants and burning wood for home heating.
Four out of 5 Americans live in cities, so urban planning can make a big difference in our lifestyles – especially if it promotes healthy diets and physical activity.
North America's prairies once were home to millions of wild animals. Today, most of that land is farmed or developed, but some grasslands have never been plowed and could be rewilded.
US military leaders have to plan for operations all over the world, so they can't afford to ignore climate change or debate its causes.
According to a new study, about four in 10 air pollution deaths in the US are due to emissions crossing state lines.
Bangladesh is on the front lines of climate change, but factors including money, gender and religion make some Bangladeshis much more vulnerable than others. Can it find inclusive ways to cope?
Golden Rice – a controversial genetically modified product designed to combat malnutrition – has been approved as safe in the Philippines. But key questions remain unanswered.
Can maps of people's flooded properties convince them that rising sea level is a threat?
Storing more carbon in soil helps slow climate change and makes croplands more productive. But there are two kinds of soil carbon that are both important, but function very differently.