Fossil fish rewrites otophysan evolution history

October 05, 2025 Reported by AI

A tiny fossil fish discovered in southwestern Alberta is the oldest North American otophysan, offering new insights into the evolution of freshwater fish species. Named Acronichthys maccognoi, the 4 cm specimen from the Late Cretaceous period suggests otophysans transitioned from marine to freshwater environments at least twice. The find, detailed in a study published on October 2 in Science, challenges previous understandings of their global spread.

Rodent Evolution Study on Hand Structures

September 11, 2025 Reported by AI

A study on the evolution of rodents emphasized the importance of hand structures, featured in Science Magazine's September 4, 2025, issue. It explores 'rules of thumb' in rodent development.

Evolution may explain why women outlive men

A new study suggests that the evolution of menopause plays a key role in women's longer lifespans compared to men. Researchers propose that post-reproductive life in women allows investment in grandchildren, contrasting with men's continued reproduction. This theory draws on data from hunter-gatherer societies and modern populations.

First Nitrogen-Fixing Organelle Confirmed

Scientists have confirmed the existence of the first-ever nitrogen-fixing organelle in a eukaryotic cell, marking a key advancement in understanding cellular evolution and nitrogen cycles.