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Montreal Protocol Signed to Protect the Ozone Layer

The Montreal Protocol was enacted in response to the discovery that the ozone layer—which shields life on Earth from harmful radiation—was diminishing. Signed by the majority of the world's nations, the treaty mandates the decreased use of ozone-depleting substances such as chlorofluorocarbons (CFCs) and has been amended several times based on new scientific data. By 1993, CFC production had dropped dramatically. If the agreement is followed, the ozone layer is expected to recover by what year?

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Traumatic Insemination

Traumatic insemination is a form of mating in some invertebrates in which the male pierces the female's abdomen and injects sperm through the wound. The sperm then travel to the female's ovaries. Though it often results in successful reproduction, the practice can be harmful to females, as the wound is susceptible to infection, and immune reactions can occur. Homosexual and inter-species instances of the practice have also been observed. What insect reproduces solely by traumatic insemination?

Born on a day like today

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B.B. King

A singer and guitarist born into a sharecropping family in the Mississippi Delta region of the US, King began playing guitar at 12. He worked as a radio DJ in Memphis before coming to prominence as a guitarist in 1952. He has toured widely, averaging over 300 shows a year for nearly 30 years. King famously named his guitar Lucille after a woman who inspired a fight at one of his concerts that ended with the venue burning down. King's first name is Riley. What does B.B. stand for?

Last updated on Sunday, 16th September 2012

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