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The Vikings are remembered as fierce fighters, but even these mighty warriors were no match for climate change. Scientists recently found that ice sheet growth and sea level rise led to massive coastal flooding that inundated Norse farms and ultimately drove the Vikings out of Greenland in the 15th century.

The Vikings first established a foothold in southern Greenland around A.D. 985 with the arrival of Erik Thorvaldsson, also known as “Erik the Red,” a Norwegian-born explorer who sailed to Greenland after being exiled from Iceland. Other Viking settlers soon followed, forming communities in Eystribyggð (Eastern Settlement) and Vestribyggð (Western Settlement) that thrived for centuries. (At the time of the Vikings’ arrival, Greenland was already inhabited by people of the Dorset Culture, an Indigenous group that preceded the arrival of the Inuit people in the Arctic, according to the University of California Riverside (opens in new tab) ).

Around the 15th century, signs of Norse habitation in the region vanished from the archaeological record. Researchers previously suggested that factors such as climate change and economic shifts likely led the Vikings to abandon Greenland. Now, new findings show that rising seas played a key role, by submerging miles of coastline, according a new study published April 17 in the journal Proceedings of the National Academy of Sciences. 

Related: 1,100-year-old ‘ceremonial’ Viking shields were actually used in battle, study suggests

Between the 14th and 19th centuries, Europe and North America experienced a period of significantly cooler temperatures, known as the Little Ice Age. Under these chilly conditions, the Greenland Ice Sheet — a vast blanket of ice covering most of Greenland — would have become even bigger, Marisa Julia Borreggine (opens in new tab) , a doctoral candidate in the Department of Earth and Planetary Sciences at Harvard University, said when she presented data at an American Geophysical Union annual conference in New Orleans in December 2021.

A digital model showing simulated sea levels in southern Greenland ice (blue to white gradient), with Viking sites (green dots) and areas of flooding (blue). (Image credit: Konstantin Latychev)

As the ice sheet advanced, its increasing heaviness weighed down the substrate underneath, making coastal areas more prone to flooding, Borreggine said. At the same time, the increased gravitational attraction between the expanding ice sheet and large masses of sea ice pushed more seawater over Greenland’s coast. These two processes could have driven widespread flooding along the coastline — “exactly where the Vikings were settled,” Borreggine said. 

The scientists tested their hypothesis by modeling estimated ice growth in southwestern Greenland over the 400-year period of Norse occupation and adding those calculations to a model showing sea level rise during that time. Then, they analyzed maps of known Viking sites to see how their findings lined up with archaeological evidence marking the end of a Viking presence in Greenland. RELATED STORIES—Earliest mention of Odin, ‘king of the gods,’ found in treasure hoard from Denmark

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Their models showed that from about 1000 to 1400, rising seas around Greenland would have flooded Viking settlements by as much as 11 feet (3.3 meters), affecting about 78 square miles (204 square kilometers) of coastal land, Borreggine said. This flooding would have submerged land that the Vikings used for farming and as grazing pastures for their cattle, according to the models.

However, sea level rise was probably not the only reason the Vikings left Greenland. Other types of challenges can cause even long-standing communities to collapse, and a perfect storm of external pressures — such as climate change, social unrest and resource depletion — may have spurred the Vikings to abandon their settlements for good, Borreggine said. 

“A combination of climate and environmental change, the shifting resource landscape, the flux of supply and demand of exclusive products for the foreign market, and interactions with Inuit in the North all could have contributed to this out-migration,” she said. “Likely a combination of these factors led to the Norse migration out of Greenland and further west.”

Editor’s note: Originally published on Dec. 16, 2021, following a presentation at the annual conference of the American Geophysical Union. Updated on April 19, 2023, following the study’s publication in a peer-reviewed journal.

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Technology

Here’s where Apple makes its products — and how Trump’s tariffs could have an impact

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Here's where Apple makes its products — and how Trump's tariffs could have an impact

Apple’s iPhone 16 at an Apple Store on Regent Street in London on Sept. 20, 2024.

Rasid Necati Aslim | Anadolu | Getty Images

Apple has made moves to diversify its supply chain beyond China to places like India and Vietnam, but tariffs announced by the White House are set to hit those countries too.

U.S. President Donald Trump laid out “reciprocal tariff” rates on more than 180 countries on Wednesday.

China will face a 34% tariff, but with the existing 20% rate, that brings the true tariff rate on Beijing under this Trump term to 54%, CNBC reported. India faces a 26% tariff, while Vietnam’s rate is 46%.

Apple was not immediately available for comment when contacted by CNBC.

Here’s a breakdown on Apple’s supply chain footprint that could be affected by tariffs.

China

The majority of Apple’s iPhones are still assembled in China by partner Foxconn.

China accounts for around 80% of Apple’s production capacity, according to estimates from Evercore ISI in a note last month.

Around 90% of iPhones are assembled in China, Evercore ISI said.

While the number of manufacturing sites in China dropped between Apple’s 2017 and 2020 fiscal year, it has since rebounded, Bernstein said in a note last month. Chinese suppliers account for around 40% of Apple’s total, Bernstein said.

Evercore ISI estimates that 55% of Apple’s Mac products and 80% of iPads are assembled in China.

India

Apple is targeting around 25% of all iPhones globally to be made in India, a government minister said in 2023.

India could reach about 15%-20% of overall iPhone production by the end of 2025, Bernstein analysts estimate. Evercore ISI said around 10% to 15% of iPhones are currently assembled in India.

Vietnam

Vietnam has emerged in the past few years as a popular manufacturing hub for consumer electronics. Apple has increased its production in Vietnam.

Around 20% of iPad production and 90% of Apple’s wearable product assembly like the Apple Watch takes place in Vietnam, according to Evercore ISI.

Other key countries

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Politics

Alabama, Minnesota lawmakers join US states pushing for Bitcoin reserves

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Alabama, Minnesota lawmakers join US states pushing for Bitcoin reserves

Alabama, Minnesota lawmakers join US states pushing for Bitcoin reserves

Lawmakers in the US states of Minnesota and Alabama filed companion bills to identical existing bills that if passed into law, would allow each state to buy Bitcoin.

The Minnesota Bitcoin Act, or HF 2946, was introduced to the state’s House by Republican Representative Bernie Perryman on April 1, following an identical bill introduced on March 17 by GOP state Senator Jeremy Miller.

Meanwhile, on the same day in Alabama, Republican state Senator Will Barfoot introduced Senate Bill 283, while a bi-partisan group of representatives led by Republican Mike Shaw filed the identical House Bill 482, which allows for the state to invest in crypto, but essentially limits it to Bitcoin (BTC).

Twin Alabama bills don’t explicitly name Bitcoin

Minnesota’s Bitcoin Act would allow the state’s investment board to invest state assets in Bitcoin and other cryptocurrencies and permit state employees to add crypto to retirement accounts.

It would also exempt crypto gains from state income taxes and give residents the option to pay state taxes and fees with Bitcoin.

Alabama, Minnesota lawmakers join US states pushing for Bitcoin reserves

Source: Bitcoin Laws

The twin Alabama bills don’t explicitly identify Bitcoin, but would limit the state’s crypto investment into assets that have a minimum market value of $750 billion, a criterion that only Bitcoin currently meets.

26 Bitcoin reserve bills now introduced in the US

Introducing identical bills is not uncommon in the US and is typically done to speed up the bicameral legislative process so laws can pass more quickly.

Bills to create a Bitcoin reserve have been introduced in 26 US states, with Arizona currently the closest to passing a law to make one, according to data from the bill tracking website Bitcoin Laws.

Alabama, Minnesota lawmakers join US states pushing for Bitcoin reserves

Arizona currently leads in the US state Bitcoin reserve race. Source: Bitcoin Laws

Pennsylvania was one of the first US states to introduce a Bitcoin reserve bill, in November 2024. However, the initiative was reportedly eventually rejected, with similar bills also killed in Montana, North Dakota, South Dakota and Wyoming.

Related: North Carolina bills would add crypto to state’s retirement system 

Law, Bitcoin Regulation, United States, Policy, Bitcoin Reserve

Montana, North Dakota, Pennsylvania, South Dakota and Wyoming are the five states thathave rejected Bitcoin reserve initiatives. Source: Bitcoin Laws

According to a March 3 report by Barron’s, “red states” like Montana have faced setbacks to the Bitcoin reserve initiatives amid political confrontations between the Democratic Party and the Republican Party.

Additional reporting by Helen Partz.

Magazine: Financial nihilism in crypto is over — It’s time to dream big again

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Environment

Hyundai’s super-efficient Ioniq 6 updated with sportier look, ‘N’ model coming soon

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Hyundai's super-efficient Ioniq 6 updated with sportier look, 'N' model coming soon

Hyundai has unveiled the design refresh of its Ioniq 6 sedan, and announced that it will become a family of cars rather than a single model, with an N Line trim and upcoming N performance model, much like its sister car the Ioniq 5.

Hyundai has been doing great with its EVs lately, hitting sales records and getting great reviews.

Much of that focus has been on the Ioniq 5, an attractive crossover SUV with lots of capability at a good price – and a bonkers N performance version which has been breaking different kinds of records.

The Ioniq 6, conversely, hasn’t attracted quite as much attention, even though it has some records of its own (it’s the most efficient vehicle in the US… for under $70k).

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Between its admittedly odd looks – much more aerodynamic and rounded than the comparatively blocky 5 – and it fitting into the less-popular (but better) sedan form factor, it just hasn’t captured as much imagination as the 5.

It has also fallen somewhat behind. The Ioniq 5 got a big update this year, including a native NACS port, the first non-Tesla mass market vehicle to hit the road with one of these included (and it even charges faster than a Tesla does on home turf). The 6, however, is still sitting on its original design from when it first started production/shipping in 2022/23.

But that’s about to change, as Hyundai is giving the model some love with a design update and some hints at new things to come.

We’ve seen spy shots of these design updates before, but now Hyundai is showing them to everyone at the Seoul Mobility Show.

Hyundai showed two models today, the standard Ioniq 6 and the “N Line,” an upgraded trim level with some interior and exterior changes to look a little more sporty. Hyundai has used similar nomenclature for its other models, and that carries over here.

Both have a redesigned front end, making it look more aggressive than the prior bulbous and aerodynamic shape, and narrower headlights.

The N Line looks even more aggressive than the standard model, though, with an even more aggressive front and rear end.

Hyundai says that the redesign will also include interior enhancements for “a more comfortable, intuitive experience,” with a redesigned steering wheel, larger climate control display, upgraded materials and redesigned center console with more physical controls.

Beyond this, the refresh was light on details – intentionally, with a full unveil of specs and changes coming later. We can imagine a lot of the improvements on the 2025 Ioniq 5 will be carried over, such as a native NACS port for example, and potentially a slightly larger or faster-charging battery.

We had also previously heard hints that an N version (yes, “N” and “N Line” are different, no, we don’t know why they used these confusing names) of the Ioniq 6 is coming, and Hyundai reiterated those hints today – even giving us a glimpse of the car in the background of one of its shots.

Now THIS one looks quite aggressive, with a bigger double wing and potentially some changes to the diffuser (it’s hard to tell from the shot, as the N Line also has a modified diffuser).

The ioniq 5N has earned rave reviews from enthusiasts for its bonkers driving dynamics and comparatively reasonable price for a true performance vehicle. But it’s still an SUV format, and frankly, an SUV will never be a sportscar no matter how many horsepower you put into it (I will die on this hill).

The 6, however, with its sedan shape and footprint, could make for a much more compelling sports package once it’s all put together. So we’re very excited to see what Hyundai can do if they apply the same magic they put into the 5 into a new 6N. Looking forward to July.


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