shannon callahan

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How a fossilized forest in Arctic Norway changed the Earth's climate

In a fossilized forest in Arctic Norway, scientists find evidence of plants' power to direct climate shifts.<p>Researchers recently unearthed ancient …

Anger rises as Brazilian mine disaster threatens river and sea with toxic mud

BHP Billiton,Brazil,Mining,Business,Americas,World news,Natural disasters and extreme weather,Wildlife,Environment,Marine life<p>Conservationists and engineers battle to reduce the ecological fallout as mud and iron-ore residue from the BHP Billiton-Vale dam collapse flows down the Rio Doce to the …

Plastic waste in Pacific Ocean washed up on Hawaii beach - in pictures

Guardian sustainable business,Oceans,Environment,Waste,Recycling,Ethical and green living,Hawaii,US news,World news<p>The Great Pacific garbage patch is one of the world’s least talked about environmental disasters. At Kamilo beach in Hawaii, Sophie Thomas from the Royal Society of Arts has documented …

Meet Grandfather Flash, the Pioneer of Wildlife Photography

Last month National Geographic archivist Bill Bonner shared a beautiful book with me, <i>In the Heart of the Dark Night</i>, dedicated to the work of photographer George Shiras. As a newer photo editor at the magazine, I wasn’t familiar with his work. Shiras, who began photographing in 1889, is largely …

Bernie Sanders just gave the most powerful speech of his campaign: Why his socialism address was a defining moment

<b>Bernie Sanders (AP/Michael Dwyer)</b><p>Situating socialism within the larger American experience, Sanders forcefully challenged free market dogma<p>Sean Illing<p>November 20, 2015 9:48pm (UTC)<p>Bernie Sanders gave a remarkable speech yesterday at Georgetown University. It won’t receive the coverage it deserves, …

Quick Take: The Ocean is a Global Climate Solution

Changing Planet<p>Table corals, dominate a shallow reef near the island of Misool. Raja Ampat, Papua, Indonesia, Pacific Ocean. © Ethan Daniels<p><i>By Maria Damanaki, Global Managing Director for Oceans at The Nature Conservancy</i><p>As many people around the world know, the United Nations climate change …

Evolution Is Finally Winning Out Over Creationism, Especially Among the Young

Few issues have divided the American public as bitterly as Charles Darwin’s theory of evolution by natural selection. Since <i>On the Origin of …

These Are the Most Spectacular Nature Photos of the Year

The winners of Royal Society Publishing’s inaugural photography competition have been announced, and they’re extraordinary.<p>These inspiring nature …

Royal Society

Pictures: Rocky Mountain National Park

Straddling the Continental Divide, Colorado's Rocky Mountain National Park boasts some of the most spectacular high-mountain landscapes in the U.S.

Bill Nye says bubbling air into Earth's oceans might save the planet from ourselves

In keeping true to form, Nye laid down his opinion on yet another contentious but intriguing field during an interview with National Geographic on Nov. 15.<p>In the chat, Nye said he believes that geoengineering — a family of techniques to hack the environment — could be a game-changer for combating …

Global Warming

The world's first solar-powered bike path is generating more energy than expected

1/7<p>SolaRoad Netherlands Solar Sidewalk Contstruction<p>It’s been one year since an innovative solar-paneled bike path was laid in Krommenie, …

Climate Change Will Protect You From Sharks (Twist: This Is Really Bad)

A new study published in <i>Nature Scientific Reports</i> finds that climate change will destroy sharks’ ability to hunt. Rising CO2 levels and warmer oceans …

Climate Change

6 million years of human evolution in 1 minute

Mesmerizing reconstructions of long-lost human ancestors – created using fossil discoveries and forensic techniques – from a 2013 book published by …

Nigerian professor claims to have solved 156 year old maths problem

Dr Opeyemi Enoch believes he has solved one of the seven millennium problems in mathematics<p>A Nigerian professor has claimed to have solved a maths conundrum that had stumped scholars for more than 150 years.<p>Dr Opeyemi Enoch, from the Federal University in the ancient city of Oye Ekiti, believes he …

DNA from teeth discovered in Siberia suggest that an extinct human species lived there for 60,000 years

Until now, Denisovans were represented only by DNA from a finger bone found in Siberia's Denisova Cave in 2008.<p>Evolutionary geneticist Susanna Sawyer of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, and her colleagues have now extracted nuclear and mitochondrial DNA …

Evolution

Pictures: Great Smoky Mountains National Park

TravelPhoto Gallery<p>Straddling the North Carolina-Tennessee border, Great Smoky Mountains National Park attracts more than ten million visitors a year—more than any other U.S. national park.

Tesla's Gigafactory will produce as much renewable energy as it uses (net zero energy)

The battery 'Gigafactory' that Tesla is building in Nevada is the centerpiece of its whole mass-market electric car strategy. Without it, the company …

Scientists have created transparent solar panels that could replace windows

Solar cells integrated into new construction, particularly skyscrapers, are an enticing energy option. However, this effort can be hampered by the …

Clean Energy

The 2015 El Niño just crossed into record territory

It's been likened to Godzilla for a reason — the 2015 El Niño event, which can be found amid overheated waters of the central and eastern Pacific …

Global Warming

Rethinking Recycling: A Call to Action

We split the atom. We invented the light bulb. Heck, we not only sent a man to the moon, we brought him back again. Why, then, can we not get recycling right?<p>As the <i>New York Times</i> columnist and author John Tierney recently wrote, recycling is costly, complicated and inefficient, which prompts him to …

Sustainability

This 21-year-old invented a way to clean up the massive Pacific garbage patch

Boyan Slat is not your typical 21-year-old.<p>At an age when most people are still trying to figure out what they're going to do with their lives, the Dutch innovator is the head of The Ocean Cleanup, a nonprofit that's raised millions of dollars to put into action a plan that Slat devised.<p>His goal is …

Pollution

10 Simple Actions That Just Might Save Our World’s Oceans From Plastic

Marine life is currently under attack from all sides by plastic. From plastic in the form of large plastic bags and 2-liter soda bottles to tiny …

Are 'Treescrapers' the Future of Dense Urban Living?

A vertical garden tower just won a significant award for architecture. Is it time to start taking these designs seriously?<p>Passive House designers are the Fremen of the architectural world. They look at buildings the same way that <i>Dune</i>’s noble desert tribe thinks about water. For the Fremen, the …

Architecture

Atmotube Is A Tiny Pollution Sensor That Clears Up What’s In The Air You Breathe

Portable air quality tracker Atmotube aims to be the Waze for air quality tracking in your city. The device is a tiny tube that you can carry around in your pocket or put on a key chain to monitor the air in your environment.<p>Atmotube links to a smartphone app that tells you if the air you are …

Climate change putting UK wildlife 'increasingly at risk'

Creation and protection of wildlife areas is key as the effects of warming temperatures threaten birds, bees, butterflies and plants, says RSPB report<p>Climate change is already affecting UK nature, from seabirds to plants, with wildlife “increasingly at risk” as temperatures rise, conservationists …

Why Exercise Helps Depression

Three hundred and fifty million people worldwide are affected by depression. In the United States, in 2013, estimates revealed that 6.7 percent of …

The Future of Redwood Conservation

<b>Much has been said about the importance of old-growth redwood forests</b>. Their superlative beauty, their mind-bending longevity, their capacity to …

Conservation