A Moment of Science

Posts tagged natural

March 13, 2009

 

Earthworm crawling through grass

Darwin’s Worms

Earthworms swallow soil, extract nutrients from it, then excrete the rest up onto the surface.

September 6, 2005

 

Sleep 1 and Sleep 2

You probably feel like your sleeping schedule is out of whack in some manner. Either you sleep too much, too little, or wake up too often. In fact, the typical eight hour uninterrupted sleep is what’s really unnatural. Learn more on this Moment of Science.

September 27, 2003

 

Bitumen

A natural by-product of the distillation of crude oil, bitumen is a thick, gooey substance usually black or dark brown in color.

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