To understand how clouds get their shape, it helps to understand the basics of how they form. When air rises and cools, the water vapor it holds condenses into tiny water droplets or ice crystals.

Cognitive neuroscientist Irena Arslanova says our brain perceives time but our body shapes how we experience it. She shares how our heartbeat influences whether we experience time moving fast or slow.

Astro Shapes, a portfolio company of Wynnchurch Capital, has acquired Star, a Canfield, Ohio-based manufacturer of aluminum extrusions. No financial terms were disclosed.

Apple shapes tend to carry their weight around their midsection, with a big bust and broad shoulders, but their arms and legs tend to be slimmer.

The body-positive movement has encouraged people, especially women, to see beauty in all shapes and sizes, and it's reminded us that body ideals are culturally constructed and not based on science.

Ahead, see what sets each face shape apart and learn exactly how to determine your own. Meet the experts: Prem Tripathi, MD, is a board-certified facial plastic surgeon based in Alamo, California.

Start with the basics Before tackling complicated patterns, get comfortable with basic zentangle shapes: dots, lines, simple curves, and circles.