75 is a Special Number

By Mike • March 14, 2007 • No comments yet

As the sum of the first five pentagonal numbers, seventy-five is a pentagonal pyramidal number. It can also be categorized as a self, Keith, and enneagonal number. If any of these terms have meaning to you whatsoever, you’ll probably enjoy the science, medicine, and natural history served up in the seventy-fifth edition of the Tangled Bank, hosted by Grrlscientist at Living the Scientific Life.

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...Or These Blasts From The Past

About the Author

Mike

Mike is a leading authority in the field of standardized test preparation, but what he really aspires to be is a naturalist. Besides founding 10,000 Birds and I and the Bird, Mike has also created a number of other entertaining sites and resources, particularly the Nature Blog Network.

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Asides

Well-Written Piece on Feral and Outdoor Cats

Jim Coufal, writing for the Madison County Courier in upstate New York, shares his thoughts on the feral and outdoor cat problem.

BP Oil Spill Effecting Minnesota Birds

The spill that keeps on giving – now petroleum compounds and the chemicals used to clean up the oil from BP’s massive spill two years ago in the Gulf of Mexico are showing up in eggs of breeding birds in Minnesota.

A Snowy Egret with Pink Lores

When Francois sent me an image of a presumed Snowy Egret he got at Jamaica Bay this weekend I immediately set about trying to turn it into something else. It turns out that sometimes Snowy Egrets in breeding plumage have pink lores. And this bird had really pink lores! Check out the awesome shots Francois got.

Lego Birds

These are so cool. I hope someone will get to work on some of the New World species.

Hat-tip to my Mom.