Photo Researchers ftp March 2011

Color enhanced freeze-fracture Scanning Electron Micrograph (SEM) of leaf of Lupin plant (Lupinus), showing vascular bundle, epidermis, palisade cells...

Color enhanced freeze-fracture Scanning Electron Micrograph (SEM) of leaf of Lupin plant (Lupinus), showing vascular bundle, epidermis, palisade cells...

Color enhanced freeze-fracture Scanning Electron Micrograph (SEM) of leaf of Lupin plant (Lupinus), showing vascular bundle, epidermis, palisade cells...

Color enhanced freeze-fracture Scanning Electron Micrograph (SEM) of section of stoma of Lupin plant (Lupinus), showing guard cells and pores. Magnifi...

Color enhanced freeze-fracture Scanning Electron Micrograph (SEM) of section of stoma of Lupin plant (Lupinus), showing guard cells and pores. Magnifi...

Color enhanced freeze-fracture Scanning Electron Micrograph (SEM) of section of stoma of Lupin plant (Lupinus), showing guard cells and pores. Magnifi...

Color enhanced Scanning Electron Micrograph (SEM) of Goose Grass flower (Galium aparine), showing petals, four stamens, two styles with stigmas; magni...

Color enhanced Scanning Electron Micrograph (SEM) of Goose Grass flower (Galium aparine), showing petals, four stamens, two styles with stigmas; magni...

Color enhanced Scanning Electron Micrograph (SEM) of Goose Grass flower (Galium aparine), showing petals, four stamens, two styles with stigmas; magni...

Color enhanced Scanning Electron Micrograph (SEM) of ray floret of daisy (Bellis perennis), showing hairs at base and stigma with pollen attached; mag...

Color enhanced Scanning Electron Micrograph (SEM) of ray floret of daisy (Bellis perennis), showing hairs at base and stigma with pollen attached; mag...

Color enhanced Scanning Electron Micrograph (SEM) of ray floret of daisy (Bellis perennis), showing hairs at base and stigma with pollen attached; mag...

Color enhanced Scanning Electron Micrograph (SEM) of seed of Toadflax (Linaria); magnification x225.

Color enhanced Scanning Electron Micrograph (SEM) of seed of Toadflax (Linaria); magnification x225.

Color enhanced Scanning Electron Micrograph (SEM) of seed of Toadflax (Linaria); magnification x225.

Color enhanced Transmission Electron Micrograph (TEM) of spinach leaf mesophyll, showing cell walls, large vacuoles, and peripheral cytoplasm with nuc...

Color enhanced Transmission Electron Micrograph (TEM) of spinach leaf mesophyll, showing cell walls, large vacuoles, and peripheral cytoplasm with nuc...

Color enhanced Transmission Electron Micrograph (TEM) of spinach leaf mesophyll, showing cell walls, large vacuoles, and peripheral cytoplasm with nuc...

Color enhanced Transmission Electron Micrograph (TEM) of cells in root tip of barley plant (Hordeum), featuring vegetative cells with leucoplasts and...

Color enhanced Transmission Electron Micrograph (TEM) of cells in root tip of barley plant (Hordeum), featuring vegetative cells with leucoplasts and...

Color enhanced Transmission Electron Micrograph (TEM) of cells in root tip of barley plant (Hordeum), featuring vegetative cells with leucoplasts and...

Color enhanced Transmission Electron Micrograph (TEM) of sporogenous tissue from the African violet (Saintpaulia ionantha) using potassium permanganat...

Color enhanced Transmission Electron Micrograph (TEM) of sporogenous tissue from the African violet (Saintpaulia ionantha) using potassium permanganat...

Color enhanced Transmission Electron Micrograph (TEM) of sporogenous tissue from the African violet (Saintpaulia ionantha) using potassium permanganat...

Siberian tiger (Panthera tigris altaica) in the Hengdaohezi Tiger Park near Hailin, China.

Siberian tiger (Panthera tigris altaica) in the Hengdaohezi Tiger Park near Hailin, China.

A Siberian tiger standing on its hind legs (Panthera tigris altaica) in the Hengdaohezi Tiger Park near Hailin, China.

Cracks in ice floe in Spitsbergen.

Pressure ridge in arctic pack ice, Spitsbergen.

Ice flows and a view of Spitsbergen.

A snow bunting (Plectrophenax nivalis), gathering food from seaweed on shore in Spitsbergen.

Ice floes paired with a stormy sky in Spitsbergen.

Lichened rocks on beach in Spitsbergen.

Ice floes paired with a stormy sky in Spitsbergen.

Ice floes paired with a stormy sky in Spitsbergen.

Polar bear tracks on ice floe in Spitsbergen.

Walrus (Odobenus rosmarus) swimming in Spitsbergen waters.

Reindeer (Rangifer tarandus platyrhychus) in Spitsbergen.

Walrus (Odobenus rosmarus) swimming in Spitsbergen waters.

Walrus (Odobenus rosmarus) swimming in Spitsbergen waters.

Smoky Jungle Frog (Leptodactylus pentadactylus) in Amazon rain forest in Loreto, Peru.

Giant Gladiator Frog (Hypsiboas boans) in Amazon rainforest in Loreto, Peru.

Calico Snake (Oxyrhopus petola) in the Amazon rainforest in Loreto, Peru.

Calico Snake (Oxyrhopus petola) in the Amazon rainforest in Loreto, Peru.

Ornate Thirst Snake (Dipsas catesbyi) aka Snail-eating Snake.

Rainfrog (Eleutherodactylus ockendeni) in Amazon Basin in Loreto, Peru.

Spectacled Caiman (Caiman crocodilus) on Rio El Tigre in Loreto, Peru.

Eye of Spectacled Caiman (Caiman crocodilus) on Rio El Tigre in Loreto, Peru.

Top of Spectacled Caiman head (Caiman crocodilus) on Rio El Tigre in Loreto, Peru.

Spectacled Caiman (Caiman crocodilus) on Rio El Tigre in Loreto, Peru.