Images Dated 25th November 2005

Isotretinoin anti-acne drug

Isotretinoin anti-acne drug, molecular model. Atoms are represented as tubes and are colour- coded; carbon (yellow), hydrogen (white) and oxygen (red). Isotretinoin, also known as roaccutane, belongs to a group of drugs derived from vitamin A, called retinoids. It acts by reducing the amount of sebum (oil) that sebaceous glands in the skin produce. Excessive production of sebum blocks the sebaceous glands and creates an ideal environment for the bacteria that cause acne. Isotretinoin is only used when other treatments, such as antibiotics, have failed. This is because of its many side effects, which include birth defects, kidney disease and possibly depression

© DR TIM EVANS/SCIENCE PHOTO LIBRARY

His Royal Highness Albert Prince Consort Of Great Britain And Ireland, Original Name

His Royal Highness Albert Prince Consort Of Great Britain And Ireland, Original Name Francis Albert Augustus Charles Emmanuel Prince Of Saxe Coburg Gotha, 1819 To 1861. Hand Writing Sample

© Design Pics / Ken Welsh

Autograph, Calligraphy, Consort, Document, Example, Hand, Handwriting, Highness, His, Holograph, Hrh, Manuscript, Name, Penmanship, Prince, Royal, Sample, Signature, Signed, Writing

Abstract Leonardo figures

Abstract Leonardo figures. Conceptual computer artwork of a male and a female figure depicted in the pose drawn by the Italian scientist and artist Leonardo da Vinci (1452-1519). Leonardo's original artwork is called Vitruvian Man, after Vitruvius, an Ancient Roman architect who stated that the human form with arms and legs extended could be fitted into both a circle and a square. Leonardo's drawing successfully demonstrated this. The square shows that human height is typically equal to the span of the arms. The linking of the human form to the square and the circle was thought to reflect an underlying symmetry in the world. Vitruvian Man is one of the world's most widely used symbols

© PASIEKA/SCIENCE PHOTO LIBRARY