Neanderthals 'may have been killed off by modern humans'

Neanderthals 'may have been killed off by modern humans'

Neanderthals may have been actively killed off by modern humans, scientists believe, after a skeleton buried in an Iraqi cave was found to have a man-made spear wound.

By Aislinn Simpson
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My questions/observations on this:
1. We know who was likely to have made the weapon, but not who posessed it at the time it was thrown.
2. At what distance was the projectile thrown - i.e. accident or murder.
3. Could this be evidence of Neanderthal hominids trading and using Homo Sapiens' tools?