The Hebron is seen here being towed to open water in 2017.
The massive Hebron oil platform off the coast of Newfoundland is an engineering marvel. Here's how it was constructed.
Kelp and sardines in the Channel Islands National Marine Sanctuary.
No new oil drilling has been approved since 1984 off the California coast, where a major spill in 1969 helped launch the environmental movement. Sixty-nine percent of Californians oppose offshore drilling today.
Skimming oil in the Gulf of Mexico during the Deepwater Horizon spill, May 29, 2010.
A scientist who served on a national commission to review the 2010 BP oil spill explains why Trump administration efforts to loosen offshore drilling regulation pose major risks for minor payoffs.
Big Sur coastline.
Ashley Spratt, USFWS
For 50 years California has used laws and policies to manage development along its 1,100-mile coastline and preserve public access to the shore. Climate change will make that task harder.
Migrating humpback whales avoid loud, nearby sounds.
Humpback whales are deterred from their migration routes by the noise of air guns used to survey the ocean floor for oil and gas deposits, a new study has found.
By 2030, the Blue Economy will be worth $3 trillion. And the UK is well placed to capture a slice of this lucrative market, if it meets the challenges involved with innovation and ambition.
Shell’s drilling rig destined for waters off Alaska met with problems in the Arctic and protesters in Seattle.
AP Photo/Elaine Thompson
The industry has wanted access to offshore oil for decades, but the Arctic remains challenging. Consumers, meanwhile, seem conflicted on expanded offshore drilling.
Trans-Alaska Pipeline, northern Brooks Range, Alaska.
Oil production used to fall when prices were low. But a new drilling boom in Alaska, driven by technical advances and global partnerships, spotlights America's rise as a world oil power.
Activists in Seattle practice for demonstrations against Royal Dutch Shell’s plans to drill in the Arctic, April 17, 2015.
AP Photo/Elaine Thompson
President Obama used an obscure 1953 law to bar offshore drilling in Arctic Alaska and along the Atlantic coast. Republicans and energy companies want to reverse the ban, but it will not be easy.
U.S. Coast Guard vessels battle the fire on the Deepwater Horizon while searching for survivors from the rig’s 126-person crew.
U.S. Coast Guard/Wikipedia
The new movie 'Deepwater Horizon' depicts the blowout that triggered the 2010 BP oil spill in the Gulf of Mexico. A professor of petroleum engineering assesses what the film gets right and wrong.
It took BP 87 days to cap the Gulf of Mexico spill.
BP's plans for the Bight say it would take 10 days to begin dispersing an oil spill at source, and 35 days for well-capping equipment to reach the site – making it likely that oil would hit the coast.
The 2010 Gulf of Mexico blowout prompted a technical review, but what about corporate soulsearching?
EPA/US Coast Guard
As BP plans to drill for oil in the Great Australian Bight, questions can be asked about whether it has made the right changes to its working practices to avoid a repeat of the 2010 Gulf of Mexico disaster.
Sperm whales, like many other species, use echolocation which can be hampered by noise.
Gabriel Barathieu/Wikimedia Commons
We tend to think of the oceans as quiet, when in fact they're anything but. Noise is the "forgotten pollutant", but the good news is that unlike many other pollutants it can be switched off if we try.
Cartier Island marine reserve is part of a network that covers one-third of Australian waters.
Australian Institute of Marine Science
Marine parks need to cover large swathes of ocean, but they also need to cover the right areas if they are to deliver the best conservation. New research off Australia's northwest suggests how.
Activists surround Shell Oil rig in Seattle’s Elliot Bay to protest Arctic drilling plans.
Offshore drilling debates boil down to "Drill, baby, drill" versus "spill, baby, spill." But economists say the right question is when we know enough to drill safely – and often that means waiting.
The Kulluk, Shell’s Arctic offshore drilling platform, was grounded in 2013 after efforts by the US Coast Guard and tug vessel crews to move the vessel to a safe harbor during a winter storm.
Zachary Painter/ US Coast Guard/
Shell is going back to the Arctic to explore offshore drilling, but the company and the Department of Interior are not using the best practices for avoiding the risk of a spill.
Leiopathes, also known as black corals, are some of the oldest organisms in the sea.
A flock of scientists turned their focus to understand the Deepwater Horizon's impact, including one team that studied deep-sea corals.
Ready for more?
Department of Energy
Five years after the Deepwater Horizon oil spill, the Obama administration is looking to expand offshore drilling. Is it any safer today?