The smallest entity of life is the single cell, which exists not only as single cell organisms, but as evolution proceeds, as members of a bigger and more complex living organism. During the progression of life, an organism encounters many experiences, and encodes these experiences as memories or knowledge.

A 32-foot asteroid flew between the Earth and the Moon this morning.  It was spotted in advance.  It did not hit the Earth, but passed about 28,000 miles up.  If it had hit the Earth, it would not have done damage.  One of this size tends to hit the Earth's atmosphere every 2 years, on average.  And, as NASA notes, we get a flyby of this size in the 'tween-Earth-Moon space about once every day.

This particular one passed much closer to Earth than the Moon's distance, and in fact almost to the spacing of our Earth-launched geosynchronos satellites.  While the Moon is a hefty 236,000 miles away, geosync is only 26,000 miles away.