This DIY air purifier costs far less than a HEPA purifier, and studies say it works

The Corsi-Rosenthal Box is a DIY air purifier. Some are making theirs kid-friendly by adding unique design elements, while others are getting creative in how to transport them from office to class. (left: @roofeo24 on Twitter, right: James Andrew Smith) The Corsi-Rosenthal Box is a DIY air purifier. Some are making theirs kid-friendly by adding unique design elements, while others are getting creative in how to transport them from office to class. (left: @roofeo24 on Twitter, right: James Andrew Smith)

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Exploring a tunnel deep below Niagara Falls

Turbines that once harnessed the powerful energy of Niagara Falls into a great source of electricity came to a halt years ago. But the secrets deep below the power station are coming to life once again. Visitors can now explore the former cathedral of power and a new tunnel that opens to a spectacular view of the falls.

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