First developed in the early 19th century, the Stirling engine is regaining favor as a way to squeeze even more power out of the sun's energy.
Major oil companies including Total, Eni, Saudi Aramco, BG, Royal Dutch Shell, and others have come together to form an industry group to weigh in on climate negotiations to take place in Paris later this year.
Crude prices have risen over the past few weeks, after collapsing from $100 a barrel last summer to around $50 a barrel early this year. But as James Stafford writes, some predict prices could fall again later this year.
Iraqi oil production is growing, writes Nick Cunningham, even as Islamic State gains ground. The global glut of crude has insulated markets against geopolitical shocks, and the fall of Ramadi hasn't impacted production in Iraq's oil-rich South.
Azerbaijan has long been a key piece in the US's foreign policy puzzle, writes Nick Cunningham, and news that Congressmen traveled there at the expense of a state-owned oil company is the latest link between the countries.
OPEC mega-producer Saudi Arabia is boosting oil production to hold its market share, writes James Stafford, forcing US shale drillers to scale back production until prices rise.
Unless the US can do more to assuage Saudi Arabia's concerns, writes Nick Cunningham, Arab opposition may undermine a comprehensive deal on Iran's nuclear program.
Low oil prices are especially challenging for producers in North Dakota, where the cost of production is high. Pipeline spills and an oil train derailment there last week add another dimension to the difficult oil drilling picture in the state.
The potential of future US and UK sanctions on Russia has scuttled a Russian billionaire's plans in North Sea oil and gas fields, writes Andy Tully. It comes at a time when low oil and gas prices have decreased interest in North Sea fields.
Low oil prices have meant an uptick in demand for tankers that ship crude oil and refined products around the world, writes Charles Kennedy. And that growing demand has meant tanker companies can charge more for their services.
The US ban on oil exports could be on the way out – at least to a limited extent, writes Alexis Arthur. And it could dramatically alter the landscape of North American energy integration.
Cheap oil has challenged the oil business, but refining has been a bright spot. That's good news for the likes of Exxon and Shell, whose losses at the well have been offset by strong demand for cheap gasoline and other refined products.
Oil majors like BP and ExxonMobil are optimistic that low oil prices are helping them trim fat and right-size their operations. But those savings could come at the expense of oil field service companies like Halliburton and Transocean.
Cheap oil is good news for motorists at the pump, but the price downturn has hurt employment in the once-booming US oil industry – and that has implications for the broader economy.
Arctic drilling is becoming increasingly appealing as sea ice melts, and Russia is planning to use nuclear power to help run ports, coastal infrastructure, and oil and gas extraction.
The US has taken over a two-year chairmanship of the Arctic Council, an international forum consisting of the eight nations that have territory in the Arctic. Up until recently it has been held up as a model of international cooperation.
Low oil prices have hurt production everywhere – including Iraq, where oil revenue is needed to help rebuild after years of turmoil.
India will outstrip China in economic growth this year, according to a new IMF report, due to a recipe of policy reforms, an increase in investment, and lower oil prices.
Five years after the deadly Deepwater Horizon oil spill in the Gulf of Mexico, the Obama administration is out with new regulations on offshore drilling. The hope is to prevent future catastrophe, but environmentalists say offshore drilling still isn't worth the risks to ocean life.
A new analysis outlines how oil prices could remain well below $100 a barrel for the next two decades. But if we have learned anything over the past year, it is that oil markets are highly volatile.