This topic contains a solution. Click here to go to the answer
|
Author Question: Wooden spears would have improved the efficiency of hunting. The oldest date to A) about 900,000 ... (Read 12 times) |
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
Approximately 25% of all reported medication errors result from some kind of name confusion.
Did you know?
Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Did you know?
Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.