\begin{frame}{Revolutionäre der massentauglichen Mobilität}
    \begin{tikzpicture}
        \definecolor{th-grey}{HTML}{38434b};
        \node (Ford) at (0,0) {\includegraphics[height=.69\textheight]{Henry-Ford.jpg}};
        \node [above = -2mm of Ford]{\textbf{Henry Ford}};
        \node[right = of Ford] (Musk) {\includegraphics[height=.69\textheight]{elon-musk.jpg}};
        \node [above = -2mm of Musk]{\textbf{Elon Musk}};
        \definecolor{th-grey}{HTML}{38434b};
        \node[below right = -20mm and 5mm of Musk,draw=th-grey] {
            \tiny
            \begin{tabular}{l}
                Quellen:\\\\
                lifenlesson.com/henry-ford/\\\\
                d.ibtimes.co.uk/en/full/\\1602985/elon-musk.jpg\\
            \end{tabular}
        };
    \end{tikzpicture}
    %\begin{tabular}{c c c}
    %    \large \textbf{Henry Ford} & 
    %    \large \textbf{Elon Musk}\\
    %    \includegraphics[height = .6\textheight]{Henry-Ford.jpg}&
    %    \includegraphics[height = .6\textheight]{elon-musk.jpg}\\
    %    \footnotesize lifenlesson.com/henry-ford/ & 
    %    \footnotesize d.ibtimes.co.uk/en/full/1602985/elon-musk.jpg
    %\end{tabular}
\end{frame}