Category : Natural History

Natural History / Natural History - 3 years ago

What is a turbidity current?

Turbidity currents can be caused by earthquakes, collapsing slopes, and other geological disturbances. Once set in motion, the turbid water rushes downward and can change the physical shape of the seafloor. Turbidity is a measure of the level...

Natural History / Natural History - 3 years ago

What is geocaching?

In geocaching, participants navigate to a specific set of GPS coordinates and then attempt to find the "geocache," (usually a container or marker) at that location. The survey mark shown here illustrates how some caches may be hard to spot, even...

Natural History / Natural History - 3 years ago

What is the Census of Marine Life?

A school of spadefish in Gray's Reef National Marine Sanctuary, located off the coast of Georgia. A search of the OBIS-USA website, a product of the Census of Marine Life, shows over 3,300 records of species found in and near this sanctuary. T...

Natural History / Natural History - 3 years ago

What is aquaculture?

VIDEO: What is aquaculture? Here's what you need to know in less than a minute. Transcript As the demand for seafood has increased, technology has made it possible to grow food in coastal marine waters and the open ocean. Aquaculture is a me...

Natural History / Natural History - 3 years ago

Why does the ocean have waves?

VIDEO: What are waves? Here's what you need to know in less than a minute. Transcript The ocean is never still. Whether observing from the beach or a boat, we expect to see waves on the horizon. Waves are created by energy passing through wa...

Natural History / Natural History - 3 years ago

Do fish sleep?

A Pacific sand lance, shown here, employs a unique strategy of burrowing into sand to rest and conserve energy, and to avoid predation. The nature of fish "sleep" is an area of active research. While fish do not sleep in the same way that land...

Natural History / Natural History - 3 years ago

What is blue carbon?

Yes, this is an image of a mangrove, but did you know it is also an image of a sink? A carbon sink. Don’t know what that is? Read below. Something that has a significant effect on our daily lives and is stored within the largest system of wate...

Natural History / Natural History - 4 years ago

What is PORTS®?

PORTS® facilitates safe and efficient movement through U.S. seaports, helping to ensure our nation's economic health and prosperity. Shown here: the Jacksonville PORTS®, the second largest established in the national system, includes 46 operation...

Natural History / Natural History - 4 years ago

What is nuisance flooding?

As relative sea level increases, it no longer takes a strong storm or a hurricane to cause coastal flooding. Flooding now occurs with high tides in many locations due to climate-related sea level rise, land subsidence, and the loss of natural barrie...

Natural History / Natural History - 4 years ago

What is tectonic shift?

The Earth is in a constant state of change. Earth’s crust, called the lithosphere, consists of 15 to 20 moving tectonic plates. The plates can be thought of like pieces of a cracked shell that rest on the hot, molten rock of Earth’s mantle and fit s...

Natural History / Natural History - 4 years ago

What is a whale fall?

A whale fall community, including bacteria mats, clams in the sediments, crabs, worms, and a variety of other invertebrates. The 35-ton gray whale carcass originally settled on the seafloor at 1,674 meters depth in 1998. This photo was taken six...