During a systematic metal detector survey in southern Arizona, Deni Seymour unearthed a 16th-century cannon likely left behind by Spanish conquistadors. Deni Seymour In 1541, Spanish explorers ...

NOGALES, ARIZONA—Live Science reports that independent scholar Deni Seymour unearthed a 40-pound bronze cannon—reported to be the oldest known firearm in the continental United States—at the ...

The weapons include six 300-year-old cast iron cannon and a bronze gun dating back to the mid-16th Century. Conservators said exposure to salt in the air due to the castle's coastal location ...

During the expedition led by Coronado (left), the 40-lb. hackbut cannon shown here would have appeared similar to 15th or 16th century German light artillery pieces (top). Note the heavy wooden ...

After archaeologist Deni Seymour found the rarest artifact of her career, her excitement turned to worry that she would be investigated by police. She had unearthed a 3½-foot bronze cannon in ...

Historians have debated the expedition’s exact route for over a century, relying on vague journal entries and speculative ...

Now, archaeologists have unearthed two of the defeated group’s 16th-century cannons. They may be the oldest firearms ever discovered in the continental United States. Researchers discovered the ...