Well there was the Stellar sea cow. That was much like a manatee or a dugong.
Mammoths are extinct.
sabor toothed tigers are.
and lots of other animals are going extinct!
it is to disappear from sight.
To go away or to disappear.
Disappear means to hide away from one's vision or sight.
Add refrigerant until bubbles disappear.
Disappear means to hide away from one's vision or sight.
Depending with the topography, a ship would go as far as at least 200 kilometres before it disappears from sight.
The Moon does not actually disappear when there are no clouds in sight. It may appear to disappear briefly when it moves behind the Earth's shadow during a lunar eclipse. Otherwise, the Moon is still present, but its visibility can be affected by its phase or its position in the sky.
The animal that is constantly disappearing in Alice in Wonderland is the Cheshire cat. He can fade in and out of sight at will.
Vanish? Cease? Depart? Fade? I recommend using a thesaurus.
Eagles, hawks
Ships disappear over the horizon due to the curvature of the Earth. As a ship moves away from an observer, the Earth's surface curves downward, eventually blocking the view of the ship from sight.
He used his ring of invisibility to disappear from sight, and used his short sword which he named Sting.