The Aral Sea was an endorheic lake lying between Kazakhstan and Uzbekistan. The name roughly translates as “Sea of Islands”, referring to over 1,100 islands that had dotted its waters.
Ultrasound refers to a sound wave with a frequency greater than the upper limit of human hearing, which is generally over 20 kHz. In general, humans can hear sounds with a frequency between 20 Hz and 20 kHz.
Eyjafjallajökull is one of the smaller ice caps of Iceland. It is north of Skógar and west of Mýrdalsjökull. The ice cap covers the caldera of a volcano with a summit elevation of 1,651 metres.
The New Horizons was launched by from Cape Canaveral Air Force Station to study the surface of the moon. It was the fastest man-made object ever launched from Earth.
Andros island in the Bahamas has the largest collection of the blue holes. Andros is the largest island in the Bahamas and it more than 200 Blue Holes. Blue Holes are usually sink holes or underwater caves in shape of a circle.
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