Are we dumber than our grandparents?

Social psychologists are tracking IQ scores and noticed a decline in the last decade after a steady rise since the 1950s. Some wonder if the recent downturn reflects genes that have been eroding all along. Are we evolving stupidity?

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?