This Day In History (Boston Globe)

In 1974, the bone fragments of a 3.2 million year-old hominid were
discovered by scientists in Ethiopia; the skeletal remains were
nicknamed "Lucy."
Why do I bring this up here?  Because, while the Globe does not mention
this, the discoverers of these fragments, led by Donald Johanson, were
Beatles fans.  They named this hominid after "Lucy in the Sky with
Diamonds."  True story.