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What is the deepest known point in the Earth's seabed?

Tonga Trench

Challenger Deep

Milwaukee Deep

Philippine Trench

The Challenger Deep is the deepest known point in the Earth's seabed hydrosphere, with a depth of 10,898 to 10,916 m by direct measurement from submersibles, and slightly more by sonar bathymetry. It is in the Pacific Ocean, at the southern end of the Mariana Trench near the Mariana Islands group. The Challenger Deep is a relatively small slot-shaped depression in the bottom of a considerably larger crescent-shaped oceanic trench.

Ts

2

NOAA Ocean Exploration & Research wikipedia → Challenger Deep

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This is Sable Island, known as the graveyard of the Atlantic. It is about 109 miles southeast of Nova Scotia. What is the island origin?

it is the top of a drowned mountain

Which direction are Easter Island moai facing?

Tristan da Cunha is the most remote inhabited archipelago in the world. Who discovered it?

Ferdinand Magellan

Tristan da Cunha

What is the scientific study of mosses called?

Dendrochronology