Periodic table soap — some of it glow-in-the-dark — by bubblegenius.

A double-sided galaxy pendant by ctrlaltdeviant:

Carl Sagan said it best when he explained, “we are made of star stuff.” You can add a splash of color and remind yourself of the wonders of universe (and our place in it) while wearing this.

Crochet pi ornaments by EternalSunshine.
A necklace depicting the spectral classes of stars by LittleRaven.

A necklace depicting the spectral classes of stars by LittleRaven.

A periodic table pendant by NoisyBirdStudio.
PEACE spelled in amino acids by molecularmuse.

Beautiful snowflake photography by Kenneth G. Libbrecht at snowcrystals.com. Check out the website to see more photos, learn about the physics of snowflakes and buy snowflake books.

Glow-in-the-dark soap modeled to look like E. coli by CleanerScience. This seller features more soap modeled to look like petri dishes of bacteria.

Glow-in-the-dark soap modeled to look like E. coli by CleanerScience. This seller features more soap modeled to look like petri dishes of bacteria.

A phases of the moon bracelet by nerdgoddess.
A Fibonacci Pillow Cover by deliciousdemon.
Pi Earrings by nerdgoddess.
Pi Stamped Sterling Silver Pendant by nicholasandfelice.
Just in time for Christmas: Santa’s Brain Christmas Ornament by NeverlandJewelry.

Just in time for Christmas: Santa’s Brain Christmas Ornament by NeverlandJewelry.