solar activity
... that solar activity and related events have been recorded since the time of the Babylonians in the 8th century BCE? (TAFI)
... that <b id="mwAzM"><a class="mw-redirect" href="./Solar_activity" id="mwAzQ" rel="mw:WikiLink" title="Solar activity">solar activity</a></b> and related events <i id="mwAzU">(<a href="./Solar_flare" id="mwAzY" rel="mw:WikiLink" title="Solar flare">solar flare</a> pictured)</i> have been recorded since the time of the <a class="mw-redirect" href="./Babylonians" id="mwAzc" rel="mw:WikiLink" title="Babylonians">Babylonians</a> in the 8th century BCE? (<small id="mwAzg"><a class="mw-redirect" href="./Wikipedia:Today's_articles_for_improvement" id="mwAzk" rel="mw:WikiLink" title="Wikipedia:Today's articles for improvement">TAFI</a></small>)