[ad_1] <br><a target="_blank" href="https://madison.com/news/science/scientists-find-universal-mathematical-law-hidden-in-sand-ripples/video_7bc51b9f-1a58-5aed-b685-9d8abe8ede6f.html" rel="noopener">Scientists find universal mathematical 'law' hidden in sand ripples</a> <font color="#6f6f6f">Madison.com</font> <br>[ad_2] <br><a href="https://madison.com/news/science/scientists-find-universal-mathematical-law-hidden-in-sand-ripples/video_7bc51b9f-1a58-5aed-b685-9d8abe8ede6f.html">Source link </a>
