Computer
An example of an object made or altered by humans is a smartphone. It is designed, assembled, and refined through human engineering and technology to serve various purposes such as communication, entertainment, and productivity.
YesThe definition of an artifact is any object recovered in archaeological work which was made or altered by humans.
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An artifact is typically considered to be any object made or modified by humans. Things that are not artifacts would include natural objects like rocks, trees, or rivers, which have not been shaped or altered by human intervention.
humans always do
The materials were made by nature. Humans made the product from the materials, and wrote them.
The use of any object can be altered, spiritual or not. A spiritual object only has spiritual significance to those who believe in the power of the object.
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None. There are not even any plans in development to visit Eris. Humans have never gone farther than the moon. Pluto is the most distant object visited by a man-made object.
I think the argument can be made that EVERY modern dog breed has been created/"genetically altered"/specifically bred soley to benefit humans. Every dog breed has evolved to suit someone's role in life, such as: guarding, herding, hunting, companion, etc.
humans always do