The joke? Making some "scientists" believe that a 6,000 year old bit of bone was, in fact, 4.5 million years old! Scientists, emboldened by their "discoveries" that the Earth revolves around the sun, that the earth is not flat, that the ratio of a circle's circumference to its diameter is slightly more than 3, were in dire need of a reality check. God served one up big time, by convincing the secularist egg heads that the bones existed 4,494,000 years before the Earth even existed!
The gullibility of scientists is not a great surprise to those who have watched them tred their dark, God-hating path. After all, scientists have spent 70 years looking for a unified theory of everything, only to come up empty! Hard core evangelicals know that Bible is literally true (12% of us even know that Noah's wife was Joan), which is all the unified theory we need.
I haven't laughed this hard in a long time. Thank you, God, for the miracle of laughter and dumb-ass scientists!