John Cox

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www.nytimes.com

Alcohol’s Effects on the Body: What Does Drinking Do to Your Health?

From the moment someone sips [[alcohol]], it alters neurotransmitters and suppresses activity in the [[brain]], producing relaxation, disinhibition and impaired motor skills, and over time can reduce brain volume. Alcohol and its metabolic byproduct [[acetaldehyde]] act directly on tissues they contact — the [[mouth]], [[throat]] and [[esophagus]] — increasing inflammation, DNA damage and cancer risk. Drinking also affects the [[heart]] and blood vessels, raising blood pressure and contributing to arrhythmias such as atrial fibrillation, and it can modestly raise the risk of breast cancer in women. In the gut and the [[liver]] alcohol causes inflammation, fat accumulation, fibrosis and, with sustained heavy use, cirrhosis and liver failure; some early damage can reverse if consumption stops. Individual risk depends on amount consumed, genetics, preexisting conditions and overall health.

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www.nytimes.com

How Close Are the Planet’s Climate Tipping Points?

Beyond gradual climate change, scientists have identified seven vast natural systems—from coral reefs to Atlantic currents—that could undergo sudden, irreversible collapse if planetary warming crosses critical thresholds. These "tipping points" operate like switches rather than dials: once flipped, they would trigger cascading effects difficult or impossible to reverse, such as permafrost releasing massive carbon stores, Greenland's ice sheet melting irreversibly, or the Amazon rainforest degrading into savanna. The timing of these potential collapses ranges from already underway to sometime this century, but the uncertainty around predictions shouldn't obscure the genuine risks—each additional increment of warming makes these catastrophic shifts more likely.

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www.nytimes.com

What Deathbed Visions Teach Us About Living

Medical researcher Chris Kerr has documented that end-of-life visions—experiences where dying patients see deceased loved ones or meaningful places from their past—are far more common than previously thought, occurring in up to 88 percent of hospice patients, and that these visions provide profound psychological and spiritual comfort rather than representing delusional or drug-induced hallucinations. His studies, which began after Kerr witnessed his own father's death vision as a child and continued through decades at Hospice Buffalo, show that patients who experience these visions report greater emotional growth, reduced fear, and a sense of peace, while relatives find the visions help them grieve and find closure. Though skeptical doctors demand quantifiable evidence, Kerr emphasizes that these experiences represent something deeply spiritual and meaningful that transcends the conventional medical framework's ability to measure or explain.

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Harvard Business Review

When You Feel Powerful You Talk Too Much, and Your Subordinates Perform Poorly - Andrew O’Connell - Harvard Business Review

Feeling powerful makes leaders more likely to dominate conversations and appear closed-minded, which undermines team performance—a simulation of a Mount Everest expedition found teams with dominant leaders achieved 59% of their goals versus 76% for teams with more restrained leaders. The researchers suggest organizations can counteract this tendency through egalitarian cultures, reminding leaders of their teams' value, and empowering employees to challenge overly dominant behavior.

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BBC News

BBC News - Lung cancer risk 'cut by B vitamin'

A large European study found that people with high blood levels of vitamin B6 and the amino acid methionine had roughly half the risk of developing lung cancer compared to those with low levels, regardless of smoking status. However, experts caution that the correlation may simply reflect healthier overall diets and lifestyles rather than proving that B-vitamins directly prevent cancer, and that quitting smoking remains far more important than any dietary supplement in reducing lung cancer risk. Further research is needed before recommending B-vitamin supplementation as a cancer prevention strategy.

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