Mysteries of the unseen World
| Alien In this image, the head of an embryonic zebrafish looms at us like an alien. The zebrafish is a model organism currently being used for studies into the genetic causes of neurodegeneration.  Getting Closer An aphid crawls across a bit of leaf like an intrepid explorer. Aphids are widespread around the globe and feed on trees, garden plants, crops, and, seemingly, anything.  Ready to Go The pollen spores of a cutleaf geranium (Geranium dissectum) jut out, as if eager to fulfill their mission.  Good Morning Ground coffee has an extremely porous structure, as this enlightening photo makes clear.  Inside View Detailed coloration displays an intricate pattern of podocytes in a mouse kidney.  This Bites An egg of the Aedes aegypti mosquito (sometimes called the "yellow fever mosquito") hovers like a spaceship on a black background. Originating in Africa, Aedes aegypti is now found in tropical and subtropical regions throughout the world. The mosquito is a vector for transmitting several tropical diseases such as dengue fever.  Crawl Near a hair root barging through like a tree trunk, a tiny cluster of pollen grains clings to the graceful, swirling texture of a spider's skin.  Critter An aphid examines a poplar leaf, its surroundings made to look like a dreamy landscape of blue sky and never-ending green, perfect for this species' voracious appetite.  Pop Infinitesimal grains of starch are scattered like pebbles inside the cells of a cracked kernal of corn.  War In this dramatic encounter inside a human liver, an immune cell (green) battles an invading parasite, trypanosomes. Each side bears an impressive arsenal of chemical weapons—the outcome of the war will determine whether the host develops sleeping sickness.  |
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