Veronique Greenwood writes via The New York Times: Your skin is home to a thousand kinds of bacteria, and the ways they contribute to healthy skin are still largely mysterious. This mystery may be getting even more complex: In a paper published Thursday in the journal Cell Host & Microbe, researchers studying the many varieties of Cutibacterium acnes bacteria on 16 human volunteers found that each pore was a world unto itself. Every pore contained just a single type of C. acnes. C. acnes is naturally occurring, and the most abundant bacteria on skin. Its link to acne, the skin disease, is not clear, said Tami Lieberman, a professor at M.I.T. and an author of the new paper. If biologists want to unpack the relationship between your face’s inhabitants and its health, it will be an important step to understand whether varying strains of C. acnes have their own talents or niches, and how the strains are distributed across your skin.

Each person’s skin had a unique combination of strains, but what surprised the researchers most was that each pore housed a single variety of C. acnes. The pores were different from their neighbors, too — there was no clear pattern uniting the pores of the left cheek or forehead across the volunteers, for instance. What’s more, judging from the sequencing data, the bacteria within each pore were essentially identical. “There’s a huge amount of diversity over one square centimeter of your face,” said Arolyn Conwill, a postdoctoral researcher who is the study’s lead author. “But within a single one of your pores, there’s a total lack of diversity.”

What the scientists think is happening is that each pore contains descendants of a single individual. Pores are deep, narrow crannies with oil-secreting glands at the bottom, Dr. Lieberman said. If a C. acnes cell manages to get down there, it may proliferate until it fills the pore with copies of itself. This would also explain why strains that don’t grow very quickly manage to avoid being outcompeted by speedier strains on the same person. They’re not competing with each other; they’re living side by side in their own walled gardens. Intriguingly, these gardens are not very old, the scientists think. They estimate that the founding cells in the pores they studied took up residence only about one year before. What happened to the bacteria that previously lived there? The researchers don’t know — perhaps they were destroyed by the immune system, fell prey to viruses or were unceremoniously yanked out by a nose strip, clearing the way for new founders.

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Source: Slashdot – Every Pore on Your Face Is a Walled Garden

Last year saw the hottest ocean temperatures in recorded history, the sixth consecutive year that this record has been broken, according to new research. The Guardian reports: The heating up of our oceans is being primarily driven by the human-caused climate crisis, scientists say, and represents a starkly simple indicator of global heating. While the atmosphere’s temperature is also trending sharply upwards, individual years are less likely to be record-breakers compared with the warming of the oceans. Last year saw a heat record for the top 2,000 meters of all oceans around the world, despite an ongoing La Nina event, a periodic climatic feature that cools waters in the Pacific. The 2021 record tops a stretch of modern record-keeping that goes back to 1955. The second hottest year for oceans was 2020, while the third hottest was 2019.

Warmer ocean waters are helping supercharge storms, hurricanes and extreme rainfall, the paper states, which is escalating the risks of severe flooding. Heated ocean water expands and eats away at the vast Greenland and Antarctic ice sheets, which are collectively shedding around 1tn tons of ice a year, with both of these processes fueling sea level rise. Oceans take up about a third of the carbon dioxide emitted by human activity, causing them to acidify. This degrades coral reefs, home to a quarter of the world’s marine life and the provider of food for more than 500m people, and can prove harmful to individual species of fish. As the world warms from the burning of fossil fuels, deforestation and other activities, the oceans have taken the brunt of the extra heat. More than 90% of the heat generated over the past 50 years has been absorbed by the oceans, temporarily helping spare humanity, and other land-based species, from temperatures that would already be catastrophic.

The amount of heat soaked up by the oceans is enormous. Last year, the upper 2,000 meters of the ocean, where most of the warming occurs, absorbed 14 more zettajoules (a unit of electrical energy equal to one sextillion joules) than it did in 2020. This amount of extra energy is 145 times greater than the world’s entire electricity generation which, by comparison, is about half of a zettajoule. Long-term ocean warming is strongest in the Atlantic and Southern oceans, the new research states, although the north Pacific has had a “dramatic” increase in heat since 1990 and the Mediterranean Sea posted a clear high temperature record last year. The research has been published in the journal Advances in Atmospheric Sciences.

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Source: Slashdot – Hottest Ocean Temperatures In History Recorded Last Year

Google took to Twitter this weekend to complain that iMessage is just too darn influential with today’s kids. Ron Amadeo writes via Ars Technica: The company was responding to a Wall Street Journal report detailing the lock-in and social pressure Apple’s walled garden is creating among US teens. iMessage brands texts from iPhone users with a blue background and gives them additional features, while texts from Android phones are shown in green and only have the base SMS feature set. According to the article, “Teens and college students said they dread the ostracism that comes with a green text. The social pressure is palpable, with some reporting being ostracized or singled out after switching away from iPhones.” Google feels this is a problem.

“iMessage should not benefit from bullying,” the official Android Twitter account wrote. “Texting should bring us together, and the solution exists. Let’s fix this as one industry.” Google SVP Hiroshi Lockheimer chimed in, too, saying, “Apple’s iMessage lock-in is a documented strategy. Using peer pressure and bullying as a way to sell products is disingenuous for a company that has humanity and equity as a core part of its marketing. The standards exist today to fix this.”

The “solution” Google is pushing here is RCS, or Rich Communication Services, a GSMA standard from 2008 that has slowly gained traction as an upgrade to SMS. RCS adds typing indicators, user presence, and better image sharing to carrier messaging. It is a 14-year-old carrier standard, though, so it lacks many of the features you would want from a modern messaging service, like end-to-end encryption and support for non-phone devices. Google tries to band-aid over the aging standard with its “Google Messaging” client, but the result is a lot of clunky solutions that don’t add up to a good modern messaging service. Since RCS replaces SMS, Google has been on a campaign to get the industry to make the upgrade. After years of protesting, the US carriers are all onboard, and there is some uptake among the international carriers, too. The biggest holdout is Apple, which only supports SMS through iMessage. “Google clearly views iMessage’s popularity as a problem, and the company is hoping this public-shaming campaign will get Apple to change its mind on RCS,” writes Amadeo in closing. “But Google giving other companies advice on a messaging strategy is a laughable idea since Google probably has the least credibility of any tech company when it comes to messaging services. If the company really wants to do something about iMessage, it should try competing with it.”

Further reading:
Eddy Cue Wanted To Bring iMessage To Android In 2013
Apple Says iMessage On Android ‘Will Hurt Us More Than Help Us’

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Source: Slashdot – Google Says iMessage Is Too Powerful