Uncategorized
- Ecosystems
Bird Dilemma: More seabirds killed when boats discard fewer fish
A long-term study of great skuas shows that when fishing fleets discard less fish, birds that scavenge for waste make up for the loss by increasing attacks on other seabirds.
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Neural Aging Walks Tall: Aerobic activity fuels elderly brains, minds
Moderate amounts of regular walking improve brain function and attention in formerly sedentary seniors.
- Humans
From the February 17, 1934, issue
First flight over Mt. Everest, blood tests link American Indians to Siberian tribes, and the discovery of the positron.
- Earth
Desert Life
What is a desert? How many deserts are in North America? This extensive Web site offers information about the desert environment and the unique characteristics that define the beautiful desert landscapes of the U.S.
