Jim Donegan 🎵 ✅<p><a href="https://mastodon.scot/tags/ArvinAsh" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ArvinAsh</span></a> - Why No One Knows If <a href="https://mastodon.scot/tags/Photons" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Photons</span></a> Really Are <a href="https://mastodon.scot/tags/Massless" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Massless</span></a>: What if they Aren't? </p><p><a href="https://www.youtube.com/watch?v=c5BPZy2_7U8&amp;ab_channel=ArvinAsh" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">youtube.com/watch?v=c5BPZy2_7U</span><span class="invisible">8&amp;ab_channel=ArvinAsh</span></a></p><p><a href="https://mastodon.scot/tags/PhilosophyOfScience" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PhilosophyOfScience</span></a> <a href="https://mastodon.scot/tags/Science" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Science</span></a> <a href="https://mastodon.scot/tags/Physics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Physics</span></a> <a href="https://mastodon.scot/tags/Optics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Optics</span></a> <a href="https://mastodon.scot/tags/Mass" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mass</span></a> <a href="https://mastodon.scot/tags/Relativity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Relativity</span></a> <a href="https://mastodon.scot/tags/SpecialRelativity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SpecialRelativity</span></a> <a href="https://mastodon.scot/tags/Photon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Photon</span></a> <a href="https://mastodon.scot/tags/Cosmology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Cosmology</span></a> <a href="https://mastodon.scot/tags/Astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Astronomy</span></a> <a href="https://mastodon.scot/tags/Astrophysics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Astrophysics</span></a> <a href="https://mastodon.scot/tags/CMB" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CMB</span></a> <a href="https://mastodon.scot/tags/CosmicMicrowaveBackground" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CosmicMicrowaveBackground</span></a></p>