"I'm April Wilkerson, a DIY enthusiast with a passion for creative projects and hands-on building." Some countries, including the 'Dirty 15' percent, could be hit harder by Trump's tariffs All but ...

Histories of drawing instruments typically include calipers alongside dividers and compasses. Mathematicians and engineers used calipers to measure round objects, such as artillery shot, and places ...

Scientists are fascinated by the round objects in a rock studied by the Perseverance rover because their discovery inspired questions about their origin and meaning. This article examines the ...