Science Daily

1. Melanoma rates are spiking fast in these 15 Pennsylvania counties

   Penn State scientists identified a striking rise in melanoma across several Pennsylvania counties dominated by cropland and herbicide use. The elevated risk persisted even after factoring in sunlight, suggesting an environmental influence beyond the usual expectations. Researchers warn that drifting chemicals may expose nearby residents, not just farm workers.

2. New research uncovers the massive squid diet of Hawaiian pilot whales

   Hawaiian short-finned pilot whales are surprisingly voracious hunters, diving hundreds of meters beneath the Pacific to snatch squid in the dark. By tagging and tracking eight whales, researchers uncovered just how much energy these deep-sea forays require—and how many squid the whales must eat to stay fueled. Their calculations reveal that each whale downs dozens to hundreds of squid per day, adding up to a staggering 88,000 tonnes of squid consumed annually by the whole population.

3. Scientists find a surprising link between lead and human evolution

   Researchers found that ancient hominids—including early humans—were exposed to lead throughout childhood, leaving chemical traces in fossil teeth. Experiments suggest this exposure may have driven genetic changes that strengthened language-related brain functions in modern humans.

4. Chimps shock scientists by changing their minds with new evidence

   Chimps may revise their beliefs in surprisingly human-like ways. Experiments showed they switched choices when presented with stronger clues, demonstrating flexible reasoning. Computational modeling confirmed these decisions weren’t just instinct. The findings could influence how we think about learning in both children and AI.

5. Scientists recover 40,000-year-old mammoth RNA still packed with clues

   Researchers have sequenced the oldest RNA ever recovered, taken from a woolly mammoth frozen for nearly 40,000 years. The RNA reveals which genes were active in its tissues, offering a rare glimpse into its biology and final moments. Surprisingly, the team also identified ancient microRNAs and rare mutations that confirm their mammoth origin. The finding shows that RNA can endure millennia—reshaping how scientists study extinct species.