An Amici roof prism is a special prism that is meant to deviate a beam of light by ninety degrees while inverting the image. Shaped like a right angled prism whose hypotenuse has been replaced by a 90 ...

Life in the scorching hot Sahara Desert is no problem for an ant that has evolved an effective and stylish heat-repellent system, new research finds. Hairs on Saharan silver ant act like prism to ...