Research shows first-trimester pollution exposure may delay speech by 18 months, impair motor skills in premature babies.
First global assessment warns more than a quarter of sites could face critical tipping points by 2050.
Proposals by Reflect Orbital and Elon Musk's SpaceX to launch reflective and AI-powered satellites may interfere with sleep, plant cycles, and wildlife navigation, say experts.
Hot and arid climate belt expanding northward, regions once classified as moderate now falling into hottest and driest category, scientist says.
Study links biodiversity shifts to volcanic eruptions, long before human arrival.