Casting of the secondary mirror for the European Southern Observatory’s Extremely Large Telescope has been completed in Mainz, Germany. Weighing 3.5 tons and measuring 14 feet in diameter, the ...

The passenger-side mirror of every modern car in America bears the same warning: “Objects in mirror are closer than they appear.” Ever wondered why? It’s no design fault; it’s actually a safety ...

Primary design factors with regard to outside mirrors are curvature, size and spatial localization. Experiments were conducted to find the effects of these factors in relation to visibility and the ...

Q: When was the right side mirror first used and when and why was the warning changed to “objects in mirror may be closer than they appear”? Which leads to another question: Why do they say “may” when ...