For a closer look next time you’re at the beach. Pay close attention to whether you find one with a dextral or sinistral aperture.

Gastropods are the largest class of molluscs which includes limpets, snails and sea slugs. For those who weren’t sure.

Info from Discovering Sea Shells by Barry Charles

Typical gastropod anatomy

This is Robert Plutchik’s wheel of emotions. I like it because it tries to make sense out of the range of emotions we have by relating his 8 primary emotions to related ones where two primary emotions meet. For example, remorse is like feeling both disgust and sadness, awe is surprise and fear. At opposite sides of the wheel are opposite emotions eg Joy >< Sadness. Other versions of his framework go 3D and map the intensity of emotions as well, for example, rage > anger > annoyance, or ecstasy > joy > serenity. Neat.

The half-life of caffeine.