"[Our philosopher] asserted that he knew the whole secret...[H]e surveyed the two celestial strangers from top to toe, and mantained to their faces that their persons, their worlds, their suns and their stars, were created solely for the use of man. At this assertion our two travelers let themselves fall against each other, seized with a fit of...inextinguishable laughter"
-- Voltaire (1752)
Hello all. My name is Lu. This is a science blog, on a microscopic and astronomical scale (and a combination of both--extraterrestrials!). I'm biology student, pretty much in love with the universe.
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Blood clot on a sticking plaster | wellcome images
Scanning electron micrograph of the underside of a sticking plaster that has been used to treat a razor blade cut. Red blood cells (shown in red) and thin fibres of the protein fibrin (beige) can be seen between the gauze fibres of the plaster (blue-grey). The blood on the plaster is image creator Anne Weston’s. She cut her finger on a razor blade and put a plaster over it, once healed she removed and imaged the plaster. Fibrin is a protein formed from the conversion of clotting factors in the blood; the fibrin fibers trap blood cells and platelets to form a solid clot. This not only prevents further bleeding but also protects the open wound from infection.