Both types of threshold mechanism have been shown to couple horn growth with nutrition in scarab beetles and are considered facultative (polyphenic) regulatory processes, and preliminary evidence suggested that they might sometimes both be present in the same species.

Never take a first-generation Learjet past Mach 0.82; it'll tuck hard nose-down and you won't be able to pull out from the dive.

It found that trains often looped on their journey emit 14% to 20% more NOx and particulates than non-stop services.

Instead of the fine faunching black mare he usually rode he was on a light grey today, a little slower if it came to a run from the Indians or a buffalo stampede, but much less conspicuous against the snow.