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Thermometers intercomparing Reaumur, Celsius, and Fahrenheit temperatu...

Thermometers intercomparing Reaumur, Celsius, and Fahrenheit temperature scales Photo

Photo -7 of NOAA Ship FAIRWEATHER approaching pier in fog at Valdez.

Photo -7 of NOAA Ship FAIRWEATHER approaching pier in fog at Valdez. Photo

Photo -6 of NOAA Ship FAIRWEATHER approaching pier in fog at Valdez.

Photo -6 of NOAA Ship FAIRWEATHER approaching pier in fog at Valdez. Photo

Photo -5 of NOAA Ship FAIRWEATHER approaching pier in fog at Valdez.

Photo -5 of NOAA Ship FAIRWEATHER approaching pier in fog at Valdez. Photo

Note broken coral where anchor chain had overlain coral reef.

Note broken coral where anchor chain had overlain coral reef. Photo

Careless anchoring adds to stress on otherwise healthy coral reef

Careless anchoring adds to stress on otherwise healthy coral reef Photo

Careless anchoring adds to stress on otherwise healthy coral reef

Careless anchoring adds to stress on otherwise healthy coral reef Photo

A rainy day in Southeast Alaska.

A rainy day in Southeast Alaska. Photo

Dead coral reef with skeletal remnants of reef-building corals.

Dead coral reef with skeletal remnants of reef-building corals. Photo

Disease ravaged coral.

Disease ravaged coral. Photo

Scientist studying area affected by coral reef bleaching.

Scientist studying area affected by coral reef bleaching. Photo

Scientist studying area affected by coral reef bleaching.

Scientist studying area affected by coral reef bleaching. Photo

Scientist studying area affected by coral reef bleaching.

Scientist studying area affected by coral reef bleaching. Photo

Photographer standing on coral to obtain photograph of tourists could...

Photographer standing on coral to obtain photograph of tourists could be causing damage to delicate coral polyps Photo

Bizarre clouds over northern Mississippi.

Bizarre clouds over northern Mississippi. Photo

SCUBA diver refraining from touching reef animals

SCUBA diver refraining from touching reef animals Photo

Bizarre clouds over northern Mississippi.

Bizarre clouds over northern Mississippi. Photo

Photographing tourists at a Guam reef attraction

Photographing tourists at a Guam reef attraction Photo

Careless trailing of flippers on bottom can add to sedimentation probl...

Careless trailing of flippers on bottom can add to sedimentation problems affecting coral reefs. Photo

Dive tourists loving a coral reef structure to death as touching can d...

Dive tourists loving a coral reef structure to death as touching can damage or kill delicate coral polyps. Photo

Dive tourists loving a coral reef structure to death as touching can d...

Dive tourists loving a coral reef structure to death as touching can damage or kill delicate coral polyps. Photo

SCUBA divers approaching a sinkhole on a Guamanian reef.

SCUBA divers approaching a sinkhole on a Guamanian reef. Photo

Dive tourism can place additional stress on reefs

Dive tourism can place additional stress on reefs Photo

Dive tourism can place additional stress on reefs

Dive tourism can place additional stress on reefs Photo

Lake Placid Winter Olympics.

Lake Placid Winter Olympics. Photo

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