Uncategorized
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19455
It wasn’t the news of polluting runoff that caught my attention in your article, but the startling statistic that the 3 million annual increase in the U.S. population costs $480 billion in construction costs alone. That’s $160,000 dollars for each added person! John BrooksLake Shastina, Calif.
- Earth
Paved Paradise?
The precipitation-fed runoff that spills from impervious surfaces such as buildings, roads, and parking lots in developed areas increases erosion in streams, wreaks ecological havoc there, and contributes to urban heat islands.
- Math
More Progressive Primes
The first sequence consisting of 23 prime numbers in arithmetic progression has been discovered.
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From the August 25, 1934, issue
Earrings from Oklahoma's mound builders, a bathysphere's record descent, and gamma rays for splitting atoms.
