Ray Kurzweil has stated (as recently as 2008) that in eleven years (in 2028), all of mankind&#x27;s energy needs will be supplied by solar power. This will obviously not be true. Predictions are difficult, especially about the future.<p>As for Aubrey de Grey, he can state whatever he wants to, but that doesn&#x27;t make it true.<p>It is, however, noteworthy that a scientific article published in the fairly prestigious EMBO Reports [1] concluded that &quot;In his writings, de Grey fails to mention that none of these approaches has ever been shown to extend the lifespan of any organism, let alone humans.&quot;<p>[1] <a href="https:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pmc&#x2F;articles&#x2F;PMC1371037&#x2F;#__ffn_sectitle" rel="nofollow">https:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pmc&#x2F;articles&#x2F;PMC1371037&#x2F;#__ffn_...</a>