July 20, 1965:
The submersible research vessel Alvin makes its first dive
for the Woods Hole Oceanographic Institute. Alvin dives 6,000 feet into the Atlantic.
July 20, 1977:
History repeats itself as Johnstown, Pennsylvania, is engulfed in a flash flood
, killing 85 people. In the more famous, original Johnstown Flood in 1889, a single dam failed, bringing an estimated 20 million gallons of water down on the town and killing 2,209. The 1977 flood was preceded by nearly a foot of rainfall. Five dams failed, carrying an estimated 128 million gallons of water into Johnstown.
July 20, 2012:
The U.S. Geological Survey releases a report
with damning implications for mountaintop removal coalmining sites: The controversial mining method releases high levels of several toxic compounds into local soil and waterways.
Photo: Vberger/Wikimedia Commons