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Top Picks
Collection of 29 images and products
gallery gallery
Caricatures
Collection of 151 images and products
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gallery gallery
Extreme Weather
Collection of 19 images and products
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gallery gallery
Marine Life
Collection of 57 images and products
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gallery gallery
Scientists
Collection of 63 images and products
Einstein and Eddington, 1930
Einstein and Eddington, 1930
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1919 solar eclipse
1919 solar eclipse
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1919 solar eclipse
1919 solar eclipse
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Yuri Gagarin in capsule
Yuri Gagarin in capsule
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Salvinia Effect of Salvinia natans
Salvinia Effect of Salvinia natans
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Cave of Crystals, Naica Mine, Mexico
Cave of Crystals, Naica Mine, Mexico
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Cave of Crystals, Naica Mine, Mexico
Cave of Crystals, Naica Mine, Mexico
Full Range of Prints and Gifts in Stock
Salvinia Effect of Salvinia natans Featured Print

Salvinia Effect of Salvinia natans

Scanning electron micrograph of leaf detail of Salvinia natans, a floating fern type plant which has superhydrophobic trichomes or hairs on the upper surface of its leaves. Each of these eggbeater shaped hairs exhibits a hydrophilic tip on the top of each hydrophobic hair. The combination of a hydrophobic surface with hydrophilic tips is called the "Salvinia Effect". These air retaining surfaces are of great interest, particularly with regards to fuel consumption when applied to ships having to overcome friction produced by the drag of water on their hulls. This drag could be reduced dramatically with the "Salvinia Effect", a layer of air between the ship's hull and the water, saving vast amounts of fuel. A suggested estimated saving of 20 million tons of oil per year for just a 10% decrease in drag for shipping alone. Magnification: x372 (x122 at 10cm wide)

© POWER AND SYRED/SCIENCE PHOTO LIBRARY

Cave of Crystals, Naica Mine, Mexico
Cave of Crystals, Naica Mine, Mexico
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Cave of Crystals, Naica Mine, Mexico
Cave of Crystals, Naica Mine, Mexico
Full Range of Prints and Gifts in Stock
Cave of Crystals, Naica Mine, Mexico
Cave of Crystals, Naica Mine, Mexico
Full Range of Prints and Gifts in Stock
Cave of Crystals, Naica Mine, Mexico
Cave of Crystals, Naica Mine, Mexico
Full Range of Prints and Gifts in Stock
Cave of Crystals, Naica Mine, Mexico
Cave of Crystals, Naica Mine, Mexico
Full Range of Prints and Gifts in Stock
Cave of Crystals, Naica Mine, Mexico
Cave of Crystals, Naica Mine, Mexico
Full Range of Prints and Gifts in Stock
Cave of Crystals, Naica Mine, Mexico
Cave of Crystals, Naica Mine, Mexico
Full Range of Prints and Gifts in Stock
Cave of Crystals, Naica Mine, Mexico
Cave of Crystals, Naica Mine, Mexico
Full Range of Prints and Gifts in Stock
Cave of Crystals, Naica Mine, Mexico
Cave of Crystals, Naica Mine, Mexico
Full Range of Prints and Gifts in Stock
George Calver, English instrument maker
George Calver, English instrument maker
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Andrew Ainslie Common, British Astronomer
Andrew Ainslie Common, British Astronomer
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Ocean currents off the Americas
Ocean currents off the Americas
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Cave of Crystals, Naica Mine, Mexico Featured Print

Cave of Crystals, Naica Mine, Mexico

^BCave of Crystals.^b Geologist standing in the Cave of Crystals (^ICueva de los Cristales^i) in Naica Mine, Chihuahua, Mexico. The crystals are the largest known in the world, and are formed of the selenite form of gypsum (calcium sulphate). They formed over millions of years in the mineral-rich geothermally heated water that filled the caves. The crystals were discovered after the water was pumped out of the mine. The Cave of Crystals is 290 metres deep, and was discovered in 2000. Above it, 120 metres deep, is the Cave of Swords (^ICueva^i ^Ide^i ^Ilas Espadas^i), which was discovered in 1912. The crystals in this cave are smaller as its water cooled more rapidly

© JAVIER TRUEBA/MSF/SCIENCE PHOTO LIBRARY

The Sceptical Chymist (1661)
The Sceptical Chymist (1661)
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Teeth anatomy, illustration
Teeth anatomy, illustration
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Flame tests
Flame tests
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Daltons table of Atomic symbols, 1835
Daltons table of Atomic symbols, 1835
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Subrahmanyan Chandrasekhar
Subrahmanyan Chandrasekhar
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School of barracuda
School of barracuda
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Beer drinkers, 19th Century illustration
Beer drinkers, 19th Century illustration
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Harvard College Observatory, 1917
Harvard College Observatory, 1917
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Curvature of the cervical spine, X-rays
Curvature of the cervical spine, X-rays
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Nishina Yoshio and Niels Bohr
Nishina Yoshio and Niels Bohr
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Indri
Indri
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Dolly, the worlds first adult sheep clone
Dolly, the worlds first adult sheep clone
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Dolly, the worlds first adult sheep clone Featured Print

Dolly, the worlds first adult sheep clone

^B"Dolly", the sheep clone.^b Eight month old "Dolly", the world's first sheep cloned from an adult sheep cell. She is the result of research conducted by Dr. Ian Wilmut at the Roslin Institute in Edin- burgh, Scotland. Wilmut's work involved taking an egg cell from a Scottish Blackface (SB) ewe and removing the cell nucleus. Next, an adult cell from the udder of a 6-year-old Finn Dorset ewe was cultured and then injected into the enucleated egg cell. A spark of electricity then fused the udder cell with the egg cytoplasm and stimulated the egg to grow into an embryo in the womb of a surrogate SB sheep. In 1997, Wilmut introduced to the world "Dolly", the first such sheep clone

© PHILIPPE PLAILLY/SCIENCE PHOTO LIBRARY

Observing the Universe, conceptual image
Observing the Universe, conceptual image
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Seagull Nebula, composite image
Seagull Nebula, composite image
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EDTA crystals, light micrograph
EDTA crystals, light micrograph
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Karbala, Iraq
Karbala, Iraq
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PLM of crystals of testosterone
PLM of crystals of testosterone
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Supersonic shock waves, Schlieren image
Supersonic shock waves, Schlieren image
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Octopus, 19th Century illustration
Octopus, 19th Century illustration
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Sweet chestnut, 19th century illustration
Sweet chestnut, 19th century illustration
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Native silver
Native silver
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Yuri Gagarin driving through London, UK
Yuri Gagarin driving through London, UK
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Three nose types, 17th century
Three nose types, 17th century
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South American camelid, 17th century
South American camelid, 17th century
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