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Earth from space. Full-hemisphere views of the Earth showing Hurricane Linda at its peak approaching Baja California on 1997 September 11.

What Is Earth’s Velocity?

Solar system illustration. (planets; sun)

Why Are Planets Round?

World map. Continents. Oceans. Mendel thumb ok

Just How Many Oceans Are There?

ripped torn flag, pirate, skull

Are There Laws on the High Seas?

A big, powerful wave breaking near the shore.

What Makes a Wave Go Rogue?

Discover

Candles Burning On Table In Church

What Is the Most Widely Practiced Religion in the World?

Flags of the countries of the world (flagpoles).

How Many Countries Are There in the World?

NBA Lakers Celtics Finals Kevin Garnett shooting.

10 Great Sports Rivalries

Agnes with a lamb near her feet. St. Agnes (Saint Agnes) design drawing for stained glass window by J&R Lamb Studios, ink, mount size 10.5 x 14.5 in.

Roman Catholic Saints

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

July, 2006, Launch of Space Shuttle Discovery STS-121. See attached for full caption information.

Will Light-Speed Space Travel Ever Be Possible?

Artist interpretation of a Space meteoroid impact. Meteor impact. Asteroid, End of the world, danger, destruction, dinosaur extinct, Judgement Day, Planet Earth, Doomsday Predictions, comet

10 Failed Doomsday Predictions

SOFAR channel: Facts & Related Content

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sound ocean iceberg ocean current ocean basin sea ice oceanic crust ocean acidification calcite compensation depth Why Is The Ocean Blue?ocean warming pack ice