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The annual Perseid meteor shower is expected to put on a good display of shooting stars in the pre-dawn hours Tuesday. The annual shower begins as a trickle in mid-July and will continue to spark a handful of shooting stars for several nights to come. But Earth passes through the densest part of the stream Aug. 12 at around 7 a.m. ET (1100 GMT). The moon will set around 1:30 a.m. local time (regardless of your location), leaving the sky dark for a few hours of optimal meteor watching across much of North America.

Meteor watching is easy. Find the darkest location you can, away from porch lights and other lighting. Use a blanket or lounge chair to lie back and scan as much of the sky as possible. Allow 15 minutes for your eyes to adjust to the darkness. Binoculars and telescopes are of no use, as the meteors move too swiftly. Image VIA Space.com

Did you know? If we recycled 100 million unused cell phones, we could save enough energy to power 194,000 homes in America for one year. So the millions of you that bought iPhones this year, be sure to recycle the old phone. To find an e-cycler, visit.

Creative Time presents Playing the building, a sound installation in which the infrastructure, the physical plant of the building, is converted into a giant musical instrument. Devices are attached to the building structure — to the metal beams and pillars, the heating pipes, the water pipes — and are used to make these things produce sound. The activations are of three types: wind, vibration, striking. The devices do not produce sound themselves, but they cause the building elements to vibrate, resonate and oscillate so that the building itself becomes a very large musical instrument.

The Environmental Working Group, a nonprofit organization that advocates for policies that protect global and individual health, produces the Shoppers’ Guide to Pesticides in Produce. It is based on the results of nearly 43,000 pesticide tests. Here are the 12 Foods You Don’t Have to Buy Organic:

Broccoli, Eggplant, Cabbage, Banana, Kiwi, Asparagus, Sweet peas (frozen), Mango, Pineapple, Sweet corn (frozen), Avocado and Onion.