Here is one of they main theories on why Mercury may be spinning faster than they thought:

One possible explanation for Mercury’s faster rotation is that Jupiter influences its orbit. As a result, its distance from the Sun varies, which in turn affects the planet’s rotation speed,” Dr Stark explained.

Do you think this is a reasonable explanation or could there be another cause?

And below is a related video about Mercury and Venus.  Both of these planets are considered two of the most hostile in the solar system.

Their proximity to the sun and atmosphere on Venus are responsible.  We hope you like the video.

thanks to sci-news.com for the great info

thanks to NASA for the pic

https://www.youtube.com/watch?v=GcH_iiTmDGs