Brightsurf Science News & Current Events

July 01, 2001
Short periods of excercise may improve mood
Exercising even for a short period each day may improve mood, suggest the results of a pilot study of female college students.

Kangaroo, platypus are not related after all; Duke scientists refute current molecular method of classifying mammals
Classifying kangaroos and platypuses together on the evolutionary family tree is as absurd as adding your neighbors to your own family ancestral line simply because they share your love of the opera, according to scientists at Duke University.

Teens' second pregnancy rates lower with long-term contraceptives
Teens' Second Pregnancy Rates Lower With Long-Term Contraceptives The best way to help teenagers prevent a second pregnancy soon after their first one is to encourage them to use a long-term contraceptives such as Norplant or an intrauterine device, according to an analysis of a Colorado pregnancy prevention program.

Emotional support keeps brain going into old age
Relying on a network of family and friends for emotional support may slow the cognitive decline associated with getting older, and single older people may stay mentally sharper than married couples, according to a new analysis of data from the MacArthur Studies of Successful Aging.
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