Engineering News Today — September 21, 2026

As we scan the latest research and discoveries, a common thread emerges: the complex interplay between our planet's natural systems and the intricacies of life on Earth. In one sense, this is starkly illustrated by projections that children born today in Europe will experience nearly double the amount of extreme fire weather as their grandparents, highlighting the far-reaching consequences of climate change. Meanwhile, a fascinating exploration of Venus' history suggests that the planet may have once had a moon that was ultimately consumed by its massive parent body, offering a glimpse into the dynamic and often violent processes that shape our solar system.

These revelations about our planet and its neighbors are matched by new insights into the natural world closer to home. Researchers have discovered a previously unknown characteristic of cat urine, which contains a hidden "ID card" that could potentially be used to identify individual animals. In contrast, a longitudinal survey of social technology use and life satisfaction in adults has yielded surprisingly little evidence of a correlation between the two, underscoring the complexity of the relationships between human behavior, technology, and well-being. As we continue to explore and understand the intricate web of connections between our planet, its inhabitants, and the universe at large, we are reminded of the boundless opportunities for discovery and insight that await us at the intersection of science, engineering, and the natural world.

Today's signal:
• Children born today in Europe will live through almost twice as much extreme fire weather as their grandparents (phys.org)
• Venus ate its moon: How Earth's 'twin' could have swallowed a rocky satellite (phys.org)
• Longitudinal survey finds little evidence that social tech predicts life satisfaction in adults (phys.org)
• Scientists discover a hidden “ID card” in cat urine (sciencedaily.com)