flickr

Darwin by Tony
Via Flickr:
We adore babies because they’re so cute. And, of course, we are amused by jokes because they are funny. This is all backwards. It is. And Darwin shows us why. Daniel Dennett

Ancient Persian engineers made their own freezers that kept ice cold - even during desert summers. By 400 BCE, they’d perfected the ‘yakhchal,’ which which are made of thick, heat-resistant materials with vents that funnel breezes to an underground storage area and push warm air out through the top. Ice brought in during winter was used to make chilled treats in the summer. Source

Almost nothing in nature is actually blue. Instead, things that appear blue, like butterflies or feathers, usually have molecules that reflect blue light better than other colors. This is known as structural color. Humans, who only create pigmented colors, can’t have blue skin or hair because it isn’t easily absorbed and secreted the way other natural pigments are. Source

Structural differences between DNA and RNA.

DNA, or deoxyribonucleic acid, is like a blueprint of biological guidelines that a living organism must follow to exist and remain functional. RNA, or ribonucleic acid, helps carry out this blueprint’s guidelines. Of the two, RNA is more versatile than DNA, capable of performing numerous, diverse tasks in an organism, but DNA is more stable and holds more complex information for longer periods of time.