National Geographic
Menu

Tag archives for chemicals

5 Animals With Stinky Defenses

Vomiting vultures and birds that smell like cow manure are just a few of the animals that use odors to keep predators at bay.

Demystifying De-Icers

Since we are still under several feet of snow here at National Geographic headquarters in Washington, DC, with more snow on the way, now is as good a time as any to talk about the chemicals used to de-ice the roads. The most commonly used, and least expensive, de-icing chemical is sodum chloride (or rock…

Why Does Venus Glow in the Dark? Just Say NO

Right now people in the Northern Hemisphere are enjoying the last few weeks when Venus will shine bright in the night. Around the end of March the “evening star” becomes the “morning star,” and the planet won’t grace the dusk skies again until next year. (Read more at EarthSky to find out why Venus makes…