Photo Researchers ftp March 2011

Transmission electron micrograph (TEM) of a section of ileum, the final section of the small intestine. Longitudinal section of villus, showing centr...

Crohn's disease. Gross specimen of removed portion of affected intestine.

Crohn's disease. Gross specimen of removed portion of affected intestine.

Crohn's disease. Gross specimen of removed portion of affected intestine.

Platypus (Ornithorhynchus anatinus) swimming in the Taronga Zoo in Sydney, Australia.

Platypus underwater.

Legs of a person suffering from Rickets (Osteomalacia), a disease occurring chiefly in children that is caused by a deficiency in vitamin D or calcium...

Legs of a person suffering from Rickets (Osteomalacia), a disease occurring chiefly in children that is caused by a deficiency in vitamin D or calcium...

Legs of a person suffering from Rickets (Osteomalacia), a disease occurring chiefly in children that is caused by a deficiency in vitamin D or calcium...

"Windswept deformity" of the legs, caused by Rickets (Osteomalacia), a disease occurring chiefly in children that is caused by a deficiency in vitamin...

"Windswept deformity" of the legs, caused by Rickets (Osteomalacia), a disease occurring chiefly in children that is caused by a deficiency in vitamin...

Trametes versicolor (a common polyphore mushroom, known as Turkey Tail in the United States) growing in the forest.

Eastern Box Turtle (Terrapene carolina carolina).

Eastern Box Turtle (Terrapene carolina carolina) hiding in shell.

Eastern Box Turtle (Terrapene carolina carolina).

Mushroom.

Boletus edulis, commonly known as Penny Bun, Porcino, or Cep.

Mushroom species Pluteus cervinus, commonly known as the Deer Shield or the Deer or Fawn Mushroom.

Parasol mushroom (Macrolepiota sp.).

Solar panel. A solar panel is a collection of solar cells or photovoltaic cells usually part of a larger system to generate electricity from the sunl...

Polarization in photography, Photo 1 of 2..A set of two images taken with a polarizer in front of the camera lens. The polarizer was rotated to maximi...

Polarization in photography, Photo 2 of 2..A set of two images taken with a polarizer in front of the camera lens. The polarizer was rotated to maximi...

Fire extinguisher. Dry chemical powder (ammonium phosphate) 6-kilogram fire extinguisher, Mexico.

Fire hose and fire extinguisher.Fire hose and dry chemical powder (ammonium phosphate) 6-kilogram fire extinguisher, Mexico.

Recordable blu-ray disc made by Windata.

Recordable blu-ray disc made by Windata.

Recordable blu-ray disc made by Windata.

Rotational equilibrium.Several 50-g weights and a wooden ruler with the pivot point at its center are used to demonstrate that for a mechanical system...

Rotational equilibrium.Several 50-g weights and a wooden ruler with the pivot point at its center are used to demonstrate that for a mechanical system...

Rotational equilibrium.Several 50-g weights and a wooden ruler with the pivot point at its center are used to demonstrate that for a mechanical system...

Blu-ray disc. Blue laser reading/writing a Blu-ray disc, conceptual photograph.

DVD disc. Red laser reading/writing a DVD (or CD) disc, conceptual photograph.

DVD disc. Red laser reading/writing a DVD (or CD) disc, conceptual photograph.

Blu-ray disc. Blue laser reading/writing a Blu-ray disc, conceptual photograph.

Diffraction on an edge. A razor blade is placed in a beam produced by either a Helium-Neon laser operating at 632.8 nm (red, bottom panel) or a Helium...

Diffraction on an edge, Photo 1 of 2..A razor blade is placed in a beam produced by either a Helium-Neon laser operating at 632.8 nm (red, Photo 1) or...

Diffraction on an edge, Photo 2 of 2..A razor blade is placed in a beam produced by either a Helium-Neon laser operating at 632.8 nm (red, Photo 1) or...

Diffraction on a thin wire.A thin wire is placed in a beam produced by either a Helium-Neon laser operating at 632.8 nm (red, bottom panel) or a Heliu...

Diffraction on a thin wire, Photo 1 of 2.A thin wire is placed in a beam produced by either a Helium-Neon laser operating at 632.8 nm (red, Photo 1) o...

Diffraction on a thin wire, Photo 2 of 2.A thin wire is placed in a beam produced by either a Helium-Neon laser operating at 632.8 nm (red, Photo 1) o...

Diffraction on a ring, Photo 1 of 2..A ring-shaped washer is placed in a beam produced by either a Helium-Neon laser operating at 632.8 nm (red, Photo...

Diffraction on a ring, Photo 2 of 2..A ring-shaped washer is placed in a beam produced by either a Helium-Neon laser operating at 632.8 nm (red, Photo...

Arago spot, Photo 1 of 2..A steel ball is placed in a beam produced by either a Helium-Neon laser operating at 632.8 nm (red, Photo 1) or a Helium-Neo...

Arago spot, Photo 2 of 2..A steel ball is placed in a beam produced by either a Helium-Neon laser operating at 632.8 nm (red, Photo 1) or a Helium-Neo...

Diffraction on an aperture, Photo 2 of 2..A round aperture is placed in a beam produced by either a Helium-Neon laser operating at 632.8 nm (red, Phot...

Diffraction on an aperture, Photo 1 of 2..A round aperture is placed in a beam produced by either a Helium-Neon laser operating at 632.8 nm (red, Phot...

X-ray of an Angelfish.

X-ray of an Angelfish.

X-ray of a barracuda (Sphyraena sp.).

X-ray of a barracuda (Sphyraena sp.).