Expert secrets for preserving plants

Article Abstract:

Preservation of plant specimens entails careful planning and a basic knowledge of botany. It is necessary to photograph each plant prior to cutting it to keep a record of the specimen in its natural setting. The plant should be pressed and dried, after which it is mounted on a card. The collection may then be stored in nested plastic trash bags.

Plants, Plants (Organisms), Collections and collecting, Herbaria

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The lure of Icarus: with new designs and materials, human-powered fliers challenge the distance record

Article Abstract:

The fascination for human-powered flight continues to bring new technological developments. Apart from using composites to give the human-powered aircrafts the needed structural rigidity and light weight, new technologies, such as the use of batteries to conserve power, are being developed.

History, Design and construction, Aircraft, Flying-machines, Human powered aircraft

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Catch a comet by its tail

Article Abstract:

Amateur astronomers will get a good look at Comet Hale-Bopp when it approaches the earth in 1997. They need to have a reliable star atlas and proper equipment such as a drafting compass and a flexible meter stick.

Observations, Astronomers, Hale-Bopp (Comet), Hale-Bopp comet

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