ylona

 Nature

Flower, Alyssa Page

Rainbow mountains Peru

Butterfly wing

Canyon

Leaves

Blue Flowers

Lake in Montana

Biology

Nature, photography

Amethist

Mushrooms

Tulips

Science

Under the microscope, photo by Bruce Rilay

Cactus

Under the microscope, found on Flickr

Shells, by Nutfun Naher Lepi

snakeskins, original by Annaturalist

Cactus

Under the microscope, by Igor Siwanowitz