Briefings.

The article in the American Scientist journal provides summaries of recent scientific research developments. It discusses how the cataclysmic meteor that wiped out nonavian dinosaurs 66 million years ago may have contributed to the success of the first fungus-farming ants. Additionally, it explores how deep-sea hydrothermal vents can generate energy through ion flows, and how proteins in eggs and sperm recognize and bind to each other. The article also presents findings that suggest Mars' surface may not have supported life based on isotopic analysis of carbonates. [Extracted from the article]