What is the recipe for making an iceberg? Scientists know the basics from watching polar-ice sheets. Huge chunks calve, slide off, and float away as icebergs. But that’s for modern icebergs. New research reveals evidence of ancient icebergs that would dwarf today’s frozen floating mountains, leaving secular explanations out in the cold.

Science Writer Brian Thomas recently hiked in Colorado and came across some beautiful examples of cross-bedded sandstone. Why did he get so excited?

An octopus can change the color of its skin at will to mimic any kind of surrounding. It actively camouflages itself with astoundingly complicated biological machinery. Wouldn't it be great if, say, a soldier's uniform or an armored vehicle used similar technology?

The case for Neandertals as more primitive members of an evolutionary continuum that spans from apes to modern man continues to weaken. Genetic and archaeological finds are completely reshaping modern concepts of Neandertal men and women.