Knovation Site of the Day

The Encyclopedia of Earth: Insect Repellent

 Have the mosquitoes gotten to you yet? The information on this site helps you learn what to look for in an FDA recommended insect repellent. It suggests that you follow the directions for use both independently and combined with sunscreen. Some of the chemical active ingredients in repellents are DEET and picaridin. There are also natural materials from plants, and even bacteria. Even though these ingredients are from natural materials, they can have side effects if not used properly, so read the labels. If you do get an itchy bug bite, you can make a paste of baking soda to alleviate the itching.July 7

American National Holidays: The Invention of the Fourth of July

 What?! The Fourth of July was an invention? This interesting essay explains the sixteenth century British tradition of making up celebrations to mark anniversaries of events in order to make political statements. This tradition carried over into many parts of British life, and was brought, part and parcel, to America with the colonists. The essayist describes how these “celebrations” were used to protest the Stamp Act, for instance, and how the fourth estate encouraged support for American independence from the British monarchy. This essay is part of Gilder Lehrman Institute of American History’s History by Era section. It requires registration to read the information, but registration is free for educators and students.July 3

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