What factors contribute to some places having many, while other places have few?
Linguists have a lot of largely untested theories. Borrowing a tool from ecology, researchers built a model that didn't look for one worldwide explanation.
Apakah semuanya terlibat?
Organisasi lingkungan utama Amerika Serikat telah berjanji untuk menjanjikan keragaman staf dan dewan mereka selama lebih dari 20 tahun, tetapi bergerak perlahan. Apakah skandal di tempat kerja akan membuat perbedaan?
Treasury Secretary Mnuchin is taking ‘extraordinary measures’ to avoid busting the debt ceiling.
AP Photo/Jose Luis Magana
The US hit the debt ceiling in March and is expected to run out of ways to get around the new $22 trillion limit by September. An economist explains why the ceiling is a dysfunctional relic.
The white “bathtub ring” around Arizona’s Lake Mead (shown on May 31, 2018), which indicates falling water levels, is about 140 feet high.
AP Photo/Ross D. Franklin
Western states adopted a 7-year plan in May 2019 to manage low water levels in the Colorado River. Now they need to look farther ahead and accept that there will be less water far into the future.
Migration offers a fix for the islands 'drowning' as a consequence of the climate crisis – but are there better alternatives?
Jeff Jorgenson looks over a partially flooded field he farms near Shenandoah, Iowa, May 29, 2019.
AP Photo/Nati Harnik
Three scholars argue that agriculture is failing to sustain either the land or American farmers. They propose a modern version of the New Deal that centers on ecology and economic fairness.
Not everyone gets an equal share.
Most of the gains from the record economy went to those at the top, while everyone else saw much smaller gains – if any – in income and wealth.
All together now?
Major US environmental organizations have promised to diversify their staffs and boards for more than 20 years, but moved slowly. Will workplace scandals make a difference?
The problem of unsafe drinking water afflicts poor communities most.
Just as America's highways, sewage systems and water pipes need fixing, so does the growing gap between rich and poor. Trump and the Democrats could use that money to address both.
Apakah dua kembar identik, Scott di luar angkasa dan Michael di Bumi, bukan lagi kembar identik?
Sebelum mengirim manusia ke Mars atau bulan, ilmuwan perlu tahu apa efek jangka panjang tinggal di luar angkasa bagi tubuh manusia. Sekarang hasilnya datang dari si kembar Kelly dalam riset TWINS.
A U.S. Forest Service employee using a drop torch during a planned burn in Arizona’s Coconino National Forest.
Decades of wildfire suppression have allowed flammable fuels to pile up in US forests. Scientists and managers say careful use of planned fires can reduce risks of large, out-of-control burns.
A John Deere tractor makes its way through floodwaters in Fargo, North Dakota.
AP Photo/Carolyn Kaster
Recent extreme rains and weather in the Midwest are causing a multitude of problems in the topsoil that much of the nation's food supply relies on.
Blizzard conditions cover the Central and Northern Plains on March 13, 2019.
NASA Earth Observatory
What creates such dramatic storms across the US Great Plains? The key factors are topography and temperature differences.
Are space twin Scott and Earth twin Mark no longer identical?
Before sending humans to Mars or the moon, scientists need to understand what long-term space living does to the human body. Now results are coming in from the Kelly brothers in the TWINS Study,
Frozen fountain in New York City during a bomb cyclone event, Jan. 4, 2018.
What raises a common winter storm to the level of 'bomb cyclone'? It's all about rapid, sharp changes in atmospheric pressure – and the scientists who coined the term meant to highlight their power.
By the end of Prohibition, distilled spirits made up more than 75 percent of alcohol sales.
En 1919 se prohibieron las bebidas alcohólicas en EEUU y nació un mercado negro de alcohol casero. Para mejorar el sabor de este licor ilícito, se mezclaba con ingredientes dulces, creando el cóctel.
Critics say the U.S. can’t afford a Green New Deal.
AP Photo/Susan Walsh
Democrats such as Rep. Ocasio-Cortez and Sen. Markey are proposing an ambitious decarbonization plan that critics are calling unaffordable. A green economist explains how the US could pay for it.
Local newspapers keep readers’ interest on local politics.
American politics has gotten more partisan in the last 50 years. One of the reasons: the closing of local newspapers.
The Flint Hills Resources oil refinery, near downtown Houston.
AP Photo/David J. Phillip
The coal, oil and natural gas industries are also connected with human rights violations, public health disasters and environmental devastation.
Water in its solid phase, also known as ice.
AP Photo/Tony Dejak
An atmospheric scientist explains why water can do some strange-looking things at very cold temperatures, and what's different about snowfalls on Mars.