Bitlock Bike Lock Front: The U-shaped lock is made of reinforced and heat-treated steel, and features a bent shackle foot design for increasing security.
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Barclays Cycle Hire Bike: Shows some of the key features of the bike: small luggage rack in the front of handlebar (with elastic cord and open at the sides), kickstand, rear mudguard, and dynamo-powered rear LED light.
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Hurricane Katrina Approaching the Gulf Coast of USA: At the time the image was taken, Hurricane Katrina was set to become one of the most powerful storms to strike the United States, with winds of 257 kilometers per hour (160 miles per hour). The center of the storm had an air pressure of 902 millibars, the fourth lowest on record for an Atlantic storm. The lower the air pressure, the more powerful the storm.
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Multiple Rotavirus Particles: Transmission electron micrograph of multiple rotavirus particles from the feces of an infected child. Each particle is about 70 nanometers in meter. Rotavirus is the most common cause of severe diarrhea among infants.
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Form Drag Illustration Comparing Air Flows Around Various Shapes: The image compares the air flow around the following shapes (all having the same frontal area): a flat plate, a sphere, a sphere with a back fairing, and a sphere inside a streamlined housing. They are ordered from the shape generating the highest form drag (the flat plate) to the lowest. Notice the air flow (i.e. the swirl) around each shape.
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Planet Earth - The Blue Marble: This image is a mosaic of satellite-based observations, mostly obtained from a single remote-sensing device: NASA's Moderate Resolution Imaging Spectroradiometer (MODIS) flying over 700 km above the Earth onboard the Terra satellite.
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