Across
- 2. National Oceanic and Atmospheric Administration.
- 4. an ultra-low-frequency, high amplitude underwater sound detected by the U.S. National Oceanic and Atmospheric Administration (NOAA) in 1997.
- 8. an official elected or appointed to act as chief executive or nominal head of a city, town, or borough.
- 9. a navigable submersible for deep-sea exploration having a spherical watertight cabin attached to its underside.
- 12. a plausible or scientifically acceptable general principle or body of principles offered to explain phenomena.
- 13. a mythical sea creature with the head and trunk of a woman and the tail of a fish.
- 14. island between the Arctic Ocean and the Atlantic Ocean southeast of Greenland and just south of the Arctic Circle.
- 17. any of a group of female and partly human creatures in Greek mythology that lured mariners to destruction by their singing.
- 18. a building in which objects of historical, scientific, artistic, or cultural interest are stored and exhibited.
Down
- 1. a presentation (such as a film or novel) expressing or dealing with factual events.
- 3. the part of the land adjoining or near the sea.
- 5. a person who explores a new or unfamiliar area.
- 6. something offered or striven for in competition or in contests of chance.
- 7. a nation's ships of war and of logistic support.
- 10. any of a family of erect bipedal primate mammals that includes recent humans together with extinct ancestral and related forms
- 11. a shaft or hole sunk to obtain oil, brine, or gas.
- 15. any of various large tailless semi-erect primates of Africa and southeastern Asia.
- 16. a great body of salt water that covers much of the earth.
