Rhinos have roamed the Earth for millions of years, but at the turn of the century there were only about 50 white rhinos left in the world. All were in South Africa. Over the course of several decades, South Africans brought the white rhino back from the brink of extinction.  Through incredible conservation work, there are almost 20,000 white rhinos today.

As far as clean energy and green jobs go, President Obama's 2013 budget includes a Christmas-in-July package of initiatives that are designed to help pull the U.S. out of recession while transitioning the economy to cleaner, safer, more reliable and less price-spikey forms of energy. Those last two items – price and reliability of supply – are especially important to the Department of Defense, which will see its rate of growth slow dramatically under the new budget.

Sharks have a reputation for being ruthless, solitary predators, but evidence is mounting that certain species enjoy complex social lives that include longstanding relationships and teamwork. A new study, published in the latest Animal Behaviour, documents how one population of blacktip reef sharks is actually organized into four communities and two subcommunities. The research shows for the first time that adults of a reef-associated shark species form stable, long-term social bonds.

Photosynthesis is the process whereby biological systems convert sunlight into food and the source of all the fossil fuels we burn today. In a way it is the ultimate source of all energy supplies that we use. Glasgow scientists Professor Lee Cronin, Gardiner Chair of Chemistry, and Professor Mike Blatt, Regius Professor of Botany, will lead the UK efforts in two of four transatlantic research teams exploring ways to overcome limitations in photosynthesis which could then lead to ways of significantly increasing the yield of important crops for food production or sustainable bioenergy.

An international information system designed to improve and expand the exchange of data on weather, climate and water will help boost food security around the world, according to the World Meteorological Organization (WMO). The UN agency, which launched the system last month (31 January), said it would improve access to meteorological observations and products for stakeholders including the research and disaster risk reduction sectors.

Decades after President Theodore Roosevelt triggered a Teddy bear craze, the black bear nearly went extinct.

On behalf of 92 pension funds, asset managers, insurers and banks, the Carbon Disclosure Project (CDP), which holds the world’s largest collection of self-reported corporate environmental data, has sent letters to the CEOs of 415 of the world’s largest public companies calling for cost-effective management and reductions of their carbon emissions.

Wildlife officials don't usually base hunting policies on how the public feels about an animal. But the black bear seems to be different. The revered king of the forest has bounced back from near-extinction to being a nuisance in some areas. Some states are trying to figure out if residents can live at peace with bears, or if they'd rather have hunters keep numbers in check.

Although the America's Cup is one of the most globally recognized names in sport, it remains relatively unwatched in its namesake country. That's likely to change in 2013 when the cup roars into San Francisco Bay – the first time in modern history that it will be easily viewable by spectators on shore (in years past, the race has taken place well off shore so anyone without a boat or helicopter was relegated to watching on TV). In fact, no less than five million people are expected to crowd the piers over the course of the final two events in June & September 2013. With such a turnout, one can imagine both the City of San Francisco and the cup organizers see a huge opportunity for education, outreach, and the promotion of all manner of issues. Sustainability will naturally be at the forefront of visibility.

The massive cruise liner is balancing on two rocks and has massive cracks. The stricken Costa Concordia cruise liner might soon collapse under its own weight. A video produced by a remotely operated vehicle (ROV) has revealed that the rocks on which the ship sits have now started crumbling dramatically. The ROV video was shot on Feb. 11, nearly a month after the ship ran aground the Tuscan coast of Giglio, Italy, killing 17 people and leaving 15 missing. The devastating disaster at sea will be analyzed through exclusive footage on Discovery Channel's Cruise Ship Disaster: Inside the Concordia.

U.S. Forest Service researchers have confirmed what has long been suspected about a valuable tree in Alaska's Panhandle: climate warming is killing off yellow cedar.

While organic farms are great, new research finds that farms that aim for high food production using environmentally-friendly practices could be better for the environment than both organic and conventional farms. A new study, led by Oxford University scientists, compared the environmental impact of different farming systems. They found that 'integrated' farms that maximized crop yields while using environmentally-friendly techniques – such as crop rotation, organic fertilisers, over winter cover crops, and minimal use of pesticides – would use less energy and generate lower greenhouse gas emissions per unit of production than both organic and conventional farms.

Scientists say preliminary tests indicate radiation didn't cause lesions and other symptoms associated with sickened or dead ringed seals found along Alaska's northern coast last year. Radiation was considered because of the timing and size of the nuclear power plant accident in Fukushima, Japan, that followed a tsunami last March.

My three-year old daughter is one of the newest participants in Bicycle Benefits, a national program that rewards people for biking to participating businesses. Bikers pay $5 for a sticker that adheres to their helmet, which they present at participating businesses for a discount that is determined by each business. My daughter can now save 5 percent on her grocery bill from our coop grocery store or $.50 on a cup of coffee from the cafe down the street (if she wants to skip her nap). It’s a fabulous initiative that encourages the business community to support pedal power, while promoting sustainable transportation and safe practices (wearing a bike helmet).

Today, the 178th annual meeting of the American Association for the Advancement of Science is being held in Vancouver. Marcel Babin, Canada Excellence Research Chair in Remote Sensing of Canada's New Arctic Frontier at the Université Laval, is one of the researchers who will be discussing his findings on the effects of environmental changes in the Arctic. The focus of Babin's research is on Arctic micro-organisms and the findings are uncovering how melting sea ice due to environmental changes could be leading to an overall increase in algae levels in Arctic waters. Based on the models that Babin and his team developed, predictions ten years in advance about algae production in the arctic will be possible by the end of this year.

Despite great medical advances that have lengthened human life spans, your chances of living a very long life may be lower than you'd hoped. That's the conclusion of a study by two longevity experts who reviewed the standard models that predict mortality rates and turned up a major error. Instead of confirming that death rates drop once people reach their 80s or 90s – as experts have assumed for many decades -- results showed that the risk of dying continues to increase each year, no matter how old people are.

While solar energy companies throughout the world are competing for the relatively few vast land areas required to house solar farms, Israeli startup Solaris Synergy has found a new terrain to use. Instead of a land-based solar system, the company decided to develop a water-based technology. In other words: a floating solar power plant.

Science has changed the world. It has created new products and ease of service. What the future will bring is, of course, always uncertain. "It’s not every day you have robots running through your house," Barack Obama quipped last week at the White House science fair, a showcase for student exhibitors that also gave the US president a chance to reiterate a favourite theme. Science and technology, he said, "is what’s going to make a difference in this country, over the long haul".

A controversial method of drilling for natural gas, called fracking, has boomed in recent years—as have concerns over its potential to cause environmental contamination and harm human health. But a major review of the practice uncovered no signs that it is causing trouble below ground. "We found no direct evidence that fracking itself has contaminated groundwater," said Charles Groat of the University of Texas, Austin, who led the study. The report, released at the annual meeting of the American Association for the Advancement of Science (which publishes ScienceNOW), doesn't give this form of natural gas extraction a clean bill of health.