National Cancer Institute

a close up of a double strand of gold glitter

Anirudh

a lady bug sitting on top of a green leaf

Macro of a ladybug (ladybird) on some foliage.

Timothy Dykes

	Human colorectal cancer cells treated with a topoisomerase inhibitor and an inhibitor of the protein kinase ATR (ataxia telangiectasia and Rad3 related), a drug combination under study as a cancer therapy. Cell nuclei are stained blue; the chromosomal protein histone gamma-H2AX marks DNA damage in red and foci of DNA replication in green.  Created by Yves Pommier, Rozenn Josse, 2014

Phytoplankton - the foundation of the oceanic food chain. 

NOAA

Louis Reed

person holding black and white microscope

A gloved hand preparing a stem cell culture for analysis.

Jaron Nix

Robina Weermeijer

a double strand of blue and white spirals

Ashraful Islam

human anatomy figure below white wooden ceiling

Biology