The ISBN of The Observers is 0312930747.
The Observers has 281 pages.
Testing, comparing and deciding which rocks and sticks will do the job needed done.Science in the modern sense did not exist then. However early man and their prehuman ancestors were keen observers and learned rapidly from mistakes.
As keen as mustard or as keen as a kitten
The expression is to be "keen on" something or someone, if you are an enthusiast or a lover.
One observes a physical property.
A dog has a keen sense of smell, a bat has a keen sense of hearing, a cheetah has a keen sense of sight
The Observers - 2011 I was released on: USA: 10 May 2012
Ray A. Keen has written: 'Keen, Koehler, Kuntzi'
refers to the tendency of observers to see what they expect to see.
Geoffrey Keen's birth name is Geoffrey Ian Keen.
Pat Keen's birth name is Patricia Margaret Keen.