Avian Flu Wiped Out Poultry. Now the Screwworm Is Coming for Beef.

The parasitic fly that attacks warm-blooded animals was eliminated from the United States in the 1960s, but it’s creeping toward the Texas-Mexico border.

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Union Pacific to Buy Norfolk Southern in $85 Billion Railroad Deal

The merger would create the United States’ first coast-to-coast rail network, spanning 50,000 miles and …

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