Photo Researchers ftp March 2011

Iron filings magnetically attached to the ends of a horseshoe magnet.

Iron filings magnetically attached to the ends of a horseshoe magnet.

Iron filings magnetically attached to the ends of a horseshoe magnet.

Iron filings placed around a rectangular magnet with north and south ends.

Iron filings placed around two rectangular magnets with north and south ends. These magnets have been positioned to have their south and north ends fa...

Iron filings placed around two rectangular magnets with north and south ends. These magnets have been positioned to have their south and north ends fa...

Iron filings placed around a horseshoe magnet to display magnetism.

Color enhanced scanning electron micrograph of a human chromosome in metaphase. Cell division is divided into 4 stages. Metaphase, the second stage, i...

Rockslide fanning out of the mountainside near Boise, Idaho, USA.

The flames of a bonfire.

Valley fog within the Cascade Range near Ellensburg, Washington.

Cumulus and cirrus clouds with blue sky over Idaho.

These satellite photographs show a hurricane developing. On day 2 a swirling cloud mass is formed. (Thunderstorms as swirling cloud mass.) Photo one o...

These satellite photographs show a hurricane developing. On day 2 a swirling cloud mass is formed. (Thunderstorms as swirling cloud mass.) Photo one o...

These satellite photographs show a hurricane developing. By day 4 fierce winds develop at the center. (winds have increased in intensity.) Photo two o...

These satellite photographs show a hurricane developing. By day 4 fierce winds develop at the center. (winds have increased in intensity.) Photo two o...

These satellite photographs show a hurricane developing. By day 7 winds are the strongest. Photo three of three.

These satellite photographs show a hurricane developing. By day 7 winds are the strongest. Photo three of three.

These satellite photographs show a hurricane developing. First image from left to right shows day 2, a swirling cloud mass is formed. (Thunderstorms a...

These satellite photographs show a hurricane developing. First image from left to right shows day 2, a swirling cloud mass is formed. (Thunderstorms a...

Color enhanced Transmission Electron Micrograph (TEM) of the herpes simplex virus at 180,000x magnification.

Color enhanced Transmission Electron Micrograph (TEM) of the herpes simplex virus at 180,000x magnification.

Color enhanced electron micrograph of the herpes simplex virus at 100,000x magnification.

Color enhanced electron micrograph of the herpes simplex virus at 100,000x magnification.

Color enhanced electron micrograph of the herpes simplex virus at 100,000x magnification.

Color enhanced photograph of the Paranthropus palate compared with the skull of a modern African (right), an Australian aborigine, who has the largest...

Color enhanced photograph of the comparison of an Australian aborigine skull and Paranthropus (robust australopithecine) skull, showing the different...

Color enhanced photograph of the comparison of an Australian aborigine skull and Paranthropus (robust australopithecine) skull, showing the different...

Color enhanced photograph of the comparison of a gorilla skull and Paranthropus (robust australopithecine) skull. Paranthropus were bipedal hominins t...

Color enhanced photograph of the Paranthropus palate compared with the palate of a modern human.

Color enhanced photograph of the comparison of gorilla and human skeletons. Display at the National Museum of Natural History.

Color enhanced Scanning Electron Micrograph (SEM) showing grains of pollen from Euphorbia amygdaloides (Wood Spurge); magnification: 1250x.

Color enhanced Scanning Electron Micrograph (SEM) showing grains of pollen from Euphorbia amygdaloides (Wood Spurge); magnification: 1250x.

Color enhanced Scanning Electron Micrograph (SEM) showing grains of pollen from a daisy (Bellis perennis); magnification: 1300x.

Color enhanced Scanning Electron Micrograph (SEM) showing grains of pollen from a daisy (Bellis perennis); magnification: 1300x.

Color enhanced Scanning Electron Micrograph (SEM) of Caltha ovary (broken open) with ovules; magnification 100x.

Color enhanced Scanning Electron Micrograph (SEM) of Caltha ovary (broken open) with ovules; magnification 100x.

Color enhanced Scanning Electron Micrograph (SEM) of stigma of Cannabis sativa; magnification x235.

Color enhanced Scanning Electron Micrograph (SEM) of stigma of Cannabis sativa; magnification x235.

Color enhanced Transmission Electron Micrograph (TEM) of section of cell from thale cress (Arabidopsis thaliana); magnification x27,900.

Color enhanced Transmission Electron Micrograph (TEM) of section of cell from thale cress (Arabidopsis thaliana); magnification x27,900.

Color enhanced Scanning Electron Micrograph (SEM) of Forsythia anthers; magnification x60.

Color enhanced Scanning Electron Micrograph (SEM) of Forsythia anthers; magnification x60.

Color enhanced Scanning Electron Micrograph (SEM) of Forsythia anthers; magnification x60.

Color enhanced Scanning Electron Micrograph (SEM) showing sorus (naked bunch of sporangia), mature dehiscing sporangia, note spores. Leaf of Common Po...

Color enhanced Scanning Electron Micrograph (SEM) showing sorus (naked bunch of sporangia), mature dehiscing sporangia, note spores. Leaf of Common Po...

Color enhanced Scanning Electron Micrograph (SEM) showing sorus (naked bunch of sporangia), mature dehiscing sporangia, note spores. Leaf of Common Po...

Color enhanced Scanning Electron Micrograph (SEM) showing open sporangium prior to discharge of spores; leaf of Common Polypody fern (Polypodium vulga...

Color enhanced Scanning Electron Micrograph (SEM) showing open sporangium prior to discharge of spores; leaf of Common Polypody fern (Polypodium vulga...

Color enhanced Scanning Electron Micrograph (SEM) showing open sporangium prior to discharge of spores; leaf of Common Polypody fern (Polypodium vulga...