Native mostly to Madagascar and sub-Saharan Africa, chameleons are some of the most unique-looking animals on earth. One of the chameleon's most interesting physical features is its oddly shaped, swiveling eyes. These eyes move independently of one another, rotating nearly 360 180 90( 360, 180, 90 ) degrees. Because these eyes are on the sides of a chameleon's head, and because chameleons can switch between monocular vision (where they only see images collected from one both( one, both ) eye) and binocular vision (where they see images collected from one both( one, both )) chameleons can see almost everything around them, including directly behind. This special vision allows chameleons to successfully hunt fast-moving insect prey slow moving insects prey( fast-moving insect prey, slow moving insects prey ) like flies or beetles as they rush past. When a chameleon spots its prey with one eye, it swivels both eyes to lock on the target. It then shoots out its long, sticky hind limbs forelimbs tongue( hind limbs, forelimbs, tongue ) to snare the prey.

A solar cooker is a device that uses the energy of sunlight fire( sunlight, fire ) directly to heat, cook or pasteurize drink and other food materials. Many solar cookers currently in use are relatively expensive inexpensive( expensive, inexpensive ), low-tech devices, although some are as powerful or as expensive as traditional stoves and advanced, large-scale solar cookers can cook for hundreds of people. Because they use no allay fuel( allay, fuel ) and cost nothing to operate, many nonprofit organizations are promoting their use worldwide in order to help fuel costs (especially where monetary reciprocity is low) and water sound air( water, sound, air ) pollution and to slow down the deforestation and desertification caused by gathering firewood for cooking.