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A sexually transmitted disease (STD), also known as sexually transmitted infection (STI) or venereal disease (VD), is an illness that has a significant probability of transmission between humans or animals by means of human sexual behavior, including vaginal intercourse, oral sex, and anal sex...

A rotary snowplow is a piece of railroad snowfighting equipment. It is characterized by the large circular set of blades on its front end that rotate as a unit to cut through the snow on the track ahead of it. The rotary was invented by Canadian dentist J.W. Elliot in 1869, but a prototype wasn't built until the Leslie Brothers constructed one in 1883. Wedge snowplows were the traditional automated method of clearing snow from railroad tracks...

Only a few of the 23,000+ images this author captured during his time in Iraq. In all 665 days he spent, spanning 2005, 2006, 2007 and 2008...

A photoblog (or photolog, or phlog) is a form of photo sharing and publishing in the format of a blog. It differs from a blog through the predominant use of and focus on photographs rather than text. Take the work of the most talented photobloggers, various famous photographers, and many serious amateurs, select their best work and collect it all in one place...