Uncategorized
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The origins of immunity?
In social amoebas, sluglike clusters of usually independent organisms, certain cells take on a protective role that hints at the origin of immune systems in higher animals.
- Animals
Tail singers
The male Anna's hummingbird impresses females and intimidates other males by making a whipping sound with its tail feathers.
- Tech
Fire Inside
The events of 9/11 put new urgency into efforts to design buildings able to withstand the structural damage that fire can cause.
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19873
This article ignored important research by David Tilman and Jason Hill of the University of Minnesota.
