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Leatherback turtles are making exhausting journeys, in some cases nearly twice as long as usual, from nesting to feeding grounds, because of rising ocean temperatures and changing sea currents.

Though small in scale, the research provides an insight into how some marine species are being forced to adapt to the warming oceans. This week scientists warned that ocean temperatures had reached record levels with the last five years, which were the five hottest on record.

Warming oceans pose clear dangers to human life as they lead to more intense storms and rising sea levels, but the impact of the increasing frequency of heatwaves at sea on marine species is much less studied. There is evidence that some species, including commercially important fish such as cod, are migrating towards the poles in search of cooler waters, but more research is needed for a fuller picture.

North Korea fired several short-range projectiles into the sea off its east coast Thursday, Seoul officials said, just hours after the U.N. Security Council approved the toughest sanctions on Pyongyang in two decades for its recent nuclear test and long-range rocket launch.

The North's launches also come shortly after Seoul's parliament passed its first legislation on human rights in North Korea.

The new U.N. sanctions include mandatory inspections of cargo leaving and entering North Korea by land, sea or air; a ban on all sales or transfers of small arms and light weapons to Pyongyang; and expulsion of diplomats from the North who engage in "illicit activities."

In “Dreadnought,” the reader is reminded that the author is a biographer at heart: His portraits of the young Winston Churchill; of the intense, eccentric Adm. Sir John “Jacky” Fisher; and of Germany’s ambitious Adm. Alfred von Tirpitz make for a riveting narrative.

The two great fleets had vastly different origins. The German fleet was the creation of an unstable monarch, Kaiser Wilhelm II, who chose to compete for naval supremacy with the Royal Navy.

At sea as on land, World War I confounded the planners on both sides. The Germans anticipated a sea blockade, but thought that an enemy blockade close to their own coast would be vulnerable to sorties by their own warships.

On a broad scale, the effect is subtle, the studies show. The sea has risen about eight inches since 1900, and the pace is accelerating, with three inches accumulating since 1993, according to a comprehensive federal climate report released last year. Scientists predict the oceans will rise an additional three to seven inches by 2030, and as much as 4.3 feet by 2100.

By comparing properties that are virtually the same but for their exposure to the seas, researchers at the University of Colorado at Boulder and Pennsylvania State University found that vulnerable homes sold for 6.6 percent less than unexposed homes. The most vulnerable properties — those that stand to be flooded after seas rise by just one foot ­— were selling at a 14.7 percent discount, according to the study, which is set to be published in the Journal of Financial Economics

The study found the drop in prices appears to be driven primarily by investors buying multiple properties or second homes. Such buyers tend to be wealthier and better educated than owners who occupy their coastal homes, said Ryan Lewis, an assistant professor of finance at the University of Colorado and a co-author of the study

Three years ago, not long after Hurricane Irma left parts of Miami underwater, the federal government embarked on a study to find a way to protect the vulnerable South Florida coast from deadly and destructive storm surge.

The dramatic $6 billion proposal remains tentative and at least five years off. But the startling suggestion of a massive sea wall up to 20 feet high cutting across beautiful Biscayne Bay was enough to jolt some Miamians to attention

“You need to have a conversation about, culturally, what are our priorities?” said Benjamin Kirtman, a professor of atmospheric sciences at the University of Miami. “Where do we want to invest? Where does it make sense?”

In a city where “sunny day floods” increased 400% in a decade, rising seas are changing the old real estate mantra of “location, location, location.” In Miami these days, it’s all about elevation, elevation, elevation.

While some scientific models predict enough polar ice melt to bring at least 10 feet of sea level rise to South Florida by 2100, just a modest 12 inches would make 15% of Miami uninhabitable, and much of that beachside property is among America’s most valuable.

The fickle undulations between city blocks could mean the difference between survival and retreat, and the rising cost of altitude is sparking a noticeable shift in community activism and municipal budgets.

he Chinese defence ministry urged the United States on Thursday to rein in its frontline forces which Beijing has said have become more active in the air and seas near China this year.

U.S. military presence in the South China Sea, East China Sea and Taiwan Strait is the main destabilising factor in the region.

operations of U.S. warships in the seas around China have risen by 20%, while the activity of U.S. reconnaissance aircraft has risen by 40% compared with last year, Chinese defence ministry spokesman Wu Qian told a press briefing on Thursday.

Russia says it caught a U.S. Navy ship illegally operating in Russian waters in the Sea of Japan and "chased off" the offending ship on Tuesday.

The area in question has been claimed by Russia as part of its territorial waters since 1984, but the U.S. does not recognize that claim.

a Russian destroyer, verbally warned the USS John S. McCain that it would be rammed if it didn't leave the area after it violated the boundary by more than a mile, according to Russia's Defense Ministry. The McCain, an Arleigh-Burke class destroyer, immediately returned to neutral waters after the warning, according to the Kremlin.

Rex Tillerson, Trump’s pick for secretary of state, stunned lawmakers and foreign governments at his Jan. 11 Senate confirmation hearing when he said that the United States would be ready to block China’s access to artificial islands it is building in the South China Sea. Seemingly just a gaffe, the White House later appeared to double down on Tillerson’s stance, which taken at face value would be tantamount to an act of war.

The comments suggest President Donald Trump’s White House is eager to take an aggressive tone with Beijing, but lacks a coherent strategy to deal with China or a basic grasp of the legal and security issues at stake in the South China Sea, said former officials, diplomats, Asia experts and congressional aides.

Tillerson’s threat that America would bar China’s access to disputed reefs and islands in the South China Sea would mark a radical break with long established U.S. policies dating back to the 1990s

The United States and China will fight a war within the next 10 years over islands in the South China Sea, and “there’s no doubt about that”.

At the same time, the US will be in another “major” war in the Middle East.

Those are the views – nine months ago at least – of one of the most powerful men in Donald Trump’s administration, Steve Bannon,

More than a million homes and businesses along the nation’s coasts could flood repeatedly before ultimately being destroyed. Entire states in the Southeast and the Corn Belt may lose much of their agriculture as farming shifts northward in a warming world. Heat and humidity will probably grow so intense that spending time outside will become physically dangerous, throwing industries like construction and tourism into turmoil.

That is a picture of what may happen to the United States economy in a world of unchecked global warming, according to a major new report released Tuesday by a coalition of senior political and economic figures from the left, right and center, including three Treasury secretaries stretching back to the Nixon administration.

The former Treasury secretaries — including Henry M. Paulson Jr., a Republican who served under President George W. Bush, and Robert E. Rubin, a Democrat in the Clinton administration — promised to help sound the alarm. All endorse putting a price on greenhouse gases, most likely by taxing emissions.

Analysis of satellite data reveals astounding loss of 600bn tons of ice last summer as Arctic experienced hottest year on record

Last year’s summer was so warm that it helped trigger the loss of 600bn tons of ice from Greenland – enough to raise global sea levels by 2.2mm in just two months, new research has found.

Glaciers are melting away around the world due to global heating caused by the human-induced climate crisis. Ice is reflective of sunlight so as it retreats the dark surfaces underneath absorb yet more heat, causing a further acceleration in melting.

Giant kelp is among the best organisms on the planet for taking planet-warming gases out of the atmosphere. Buoyed by small, gas-filled bulbs called “bladders,” these huge algae grow toward the ocean surface at a pace of up to two feet per day. Their flexible stems and leafy blades form a dense underwater canopy that can store 20 times as much carbon as an equivalent expanse of terrestrial trees.

Yet this powerful force for planetary protection is under siege. Warming waters and worsening storms caused by climate change have weakened the kelp forests.

Most significantly, the demise of important predators such as otters and sea stars has led to an explosion in the population of sea urchins, which eat kelp.

A decade ago, Chinese President Xi Jinping launched the Maritime Silk Road, the oceanic component of his flagship Belt and Road Initiative aimed at improving China’s access to world markets by investing in transportation infrastructure

China has already secured a significant stake in a network of global ports that are central to world trade and freedom of navigation. Although the stated goal of the investments was commercial, the United States and its allies have grown increasingly concerned about the potential military implications.

Xi has frequently talked of his ambition to turn China into a “maritime superpower.” The port network offers a glimpse into the reach of those ambitions.

the secrets of Dubai are slowly seeping out. This is a city built from nothing in just a few wild decades on credit and ecocide, suppression and slavery. Dubai is a living metal metaphor for the neo-liberal globalised world that may be crashing – at last – into history.

There are three different Dubais, all swirling around each other. There are the expats, like Karen; there are the Emiratis, headed by Sheikh Mohammed; and then there is the foreign underclass who built the city, and are trapped here. They are hidden in plain view. You see them everywhere, in dirt-caked blue uniforms, being shouted at by their superiors, like a chain gang – but you are trained not to look. It is like a mantra: the Sheikh built the city. The Sheikh built the city. Workers? What workers?

Sahinal Monir, a slim 24-year-old from the deltas of Bangladesh. "To get you here, they tell you Dubai is heaven. Then you get here and realise it is hell," he says. Four years ago, an employment agent arrived in Sahinal's village in Southern Bangladesh. He told the men of the village that there was a place where they could earn 40,000 takka a month (£400) just for working nine-to-five on construction projects. It was a place where they would be given great accommodation, great food, and treated well. All they had to do was pay an up-front fee of 220,000 takka (£2,300) for the work visa – a fee they'd pay off in the first six months, easy. So Sahinal sold his family land, and took out a loan from the local lender, to head to this paradise. As soon as he arrived at Dubai airport, his passport was taken from him by his construction company. He has not seen it since. He was told brusquely that from now on he would be working 14-hour days in the desert heat – where western tourists are advised not to stay outside for even five minutes in summer, when it hits 55 degrees – for 500 dirhams a month (£90), less than a quarter of the wage he was promised. If you don't like it, the company told him, go home. "But how can I go home? You have my passport, and I have no money for the ticket," he said. "Well, then you'd better get to work," they replied.

To the north lay the mighty Hittite empire; to the south, Egypt was thriving under the reign of the great Pharaoh Ramses II. Cyprus was a copper emporium. Greece basked in the opulence of its elite Mycenaean culture, and Ugarit was a bustling port city on the Syrian coast. In the land of Canaan, city states like Hazor and Megiddo flourished under Egyptian hegemony. Vibrant trade along the coast of the eastern Mediterranean connected it all.

Experts have long pondered the cause of the crisis that led to the Late Bronze Age collapse of civilization, and now believe that by studying grains of fossilized pollen they have uncovered the cause.

Theories have included patterns of warfare, plagues and earthquakes.

North Korea and South Korea fired hundreds of artillery shells across their disputed western sea border on Monday, escalating military tensions a day after the North threatened to conduct more nuclear tests.

Earlier on Monday, North Korea told the South that it would conduct live-fire military drills in seven zones along the maritime border, which hugs the southern coast of North Korea.

“This is a premeditated provocation to test our will to defend the maritime border, and if the North provokes again using our response today as an excuse, we will act decisively,” Mr. Kim said. “We have increased our vigilance along the western frontier islands and boosted weapons’ readiness there.”

Sweden spent the past week trying, unsuccessfully, to find a foreign submarine thought to be lurking in its waters. But on Friday, having scoured the coast, the Swedish military called off the search. So what's going on in the Baltic?

What it means is that they've been searching among the islands and skerries off Stockholm for a submarine that shouldn't be there, bringing back dormant memories of the Cold War. Back in the 1970s and 80s Sweden regularly scoured its territorial waters for Soviet subs, almost always without success.

Once a a nuclear-armed whiskey-class submarine ran aground near a Swedish naval base, causing a diplomatic incident that became known inevitably as Whiskey on the Rocks. Fast forward to today, and a time when countries around the Baltic Sea are casting nervous glances towards a newly assertive Russia

Philippine President Benigno Aquino has approved the purchase of 44 billion pesos (US$932 million) worth of military equipment to help boost maritime security capability as tensions simmer in the South China Sea.

Defence Undersecretary Fernando Manalo made the announcement Saturday after the government received the first two of a dozen new South Korean-made light fighter jets to enhance the country’s air defence capabilities.

Aquino authorised the multi-year contract to purchase two frigates, eight amphibious assault vehicles, three anti-submarine helicopters, two long-range patrol aircraft, three aerial radars, munitions for the fighters and close support planes, Manalo said.

According to a 2014 report by the Union of Concerned Scientists, sea level rise threatens sites ranging from Faneuil Hall, where the Sons of Liberty planned the Boston Tea Party, to the launchpads of Cape Canaveral.

The National Park Service says a quarter of its properties are on or near the coast, and most of them contain historic structures — many of them Civil War forts vulnerable to sea level rise.

Since then, experts in preservation have gathered in Annapolis, Md., whose Colonial Annapolis Historic District is threatened; in St. Augustine, Fla., where the Castillo de San Marcos, a 17th-century fort built of light and porous coquina limestone, is highly vulnerable; and last month in Nantucket. That entire island is designated a National Historic District, and much of it is subject to flooding and erosion.