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“Salmon hatcheries can deplete wild stocks” ignores a basic fact. Hatchery stocks came from wild stocks. Their DNA is the same. There is an abundance of underused habitat in our northwest rivers. Some hatchery salmon would use these habitats if they were left alone. Instead, hatchery fish are clubbed to death to prevent their mixing […]
- Earth
Salmon hatcheries can deplete wild stocks
Hatchery fish appear to be replacing wild salmon populations in the Columbia River.
- Planetary Science
Asteroid Eros poses a magnetic puzzle
Measurements with a magnetometer aboard the NEAR-Shoemaker spacecraft a few days after it landed on the asteroid 433 Eros confirmed a major puzzle: The rock has no detectable magnetic field.
