It's unclear what caused such a sharp drop-off in the western population in ... hit a record 124 degrees Fahrenheit (51.1 degrees Celsius) on July 5. Another heat wave cooked northern California ...

It’s unclear what caused such a sharp drop-off in the western population in ... hit a record 124 degrees Fahrenheit (51.1 degrees Celsius) on July 5. Another heat wave cooked northern California ...

MADISON, Wis. (AP) — The number of monarch butterflies spending the winter in the western United States has dropped to its second-lowest mark in nearly three decades as pesticides, diminishing habitat ...

MADISON, Wis. (AP) — The number of monarch butterflies spending the winter in the western United States has dropped to its second-lowest mark in nearly three decades as pesticides, diminishing ...