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Humans Inhale as Much as 68,000 Microplastic Particles Daily, Study Finds

2 months 1 week ago
Every breath people take in their homes or car probably contains significant amounts of microplastics small enough to burrow deep into lungs, new peer-reviewed research finds, bringing into focus a little understood route of exposure and health threat. The Guardian: The study, published in the journal Plos One, estimates humans can inhale as much as 68,000 tiny plastic particles daily. Previous studies have identified larger pieces of airborne microplastics, but those are not as much of a health threat because they do not hang in the air as long, or move as deep into the pulmonary system. The smaller bits measure between 1 and 10 micrometers, or about one-seventh the thickness of a human hair, and present more of a health threat because they can more easily be distributed throughout the body. The findings "suggest that the health impacts of microplastic inhalation may be more substantial than we realize," the authors wrote.

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Solo Founders Are Battling Silicon Valley's Biggest Bias

2 months 1 week ago
Solo entrepreneurs now launch 35% of all startups, double the rate from a decade ago, yet venture capital funding patterns remain virtually unchanged, according to an analysis by venture capitalist Sajith Pai. Carta's equity management data reveals that while solo-founded companies grew from 17% of 2,600 startups in 2015 to 35% of 3,800 startups in 2024, their share of VC funding barely moved from 15 to 17%. "Valley VCs don't like solo founders," Pai, who is a partner at India-based venture firm Blume, writes in his analysis. Y Combinator CEO Garry Tan confirmed the accelerator's practice of persuading solo founders to find partners after acceptance.The bias persists despite prominent solo-founded successes including Amazon, SpaceX, and Zoom. Pai notes that "most unicorn startups have cofounders" but questions whether this reflects genuine risk differences or simply that cofounded startups receive five times more funding opportunities. "The bias against solo founders is so strong," Pai observes, that it appears repeatedly in founder complaints and venture capitalist commentary, even as other Silicon Valley biases against women and non-elite universities gradually ease.

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