Cosmic Ticks #1 with Prof Lewis (359)

<p><span style="font-size: 10pt;">How do Cosmologists measure Space-Time? Professor Lewis explains Einstein's clocks and the new cosmic ticks. </span></p> <p><strong><span style="font-size: 10pt;"><a href= "https://drkarl.com">DrKarl.com</a></span></strong></p> <p><strong><span style="font-size: 10pt;"><a href= "https://www.geraintflewis.com/">Geraint F Lewis</a></span></strong></p>