Ancient Sword, Possibly Viking, Discovered via Dredging
The sword dates back more than 1,000 years to the 10th century A.D., which is the period of the earliest known dynasty that settled in that area.
Read moreThe sword dates back more than 1,000 years to the 10th century A.D., which is the period of the earliest known dynasty that settled in that area.
Read moreHypoxic dead zones, which occur when dissolved oxygen levels in water drop so low that fish and other aquatic animals living there suffocate, are well-documented problems in many coastal waters. Now, a Duke University-led study reveals that they also occur in freshwater urban streams. The study measured dissolved oxygen concentrations, light levels, water chemistry and stream flow in six streams
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