In this talk we discuss intermediate mass black holes (IMBHs) by their amplilification of distant sources; MACHO searches have studied event times $2 h \lesssim t_0 \lesssim 2 y$ corresponding masses in the range $10^{ -6} M_{ \odot} \lesssim M \lesssim 100 M_{ \odot}$. We suggest that larger masses up to $10^6 M_{ \odot}$ are also of considerable interest by arguments about the entropy of the universe. One percent by mass of dark energy can provide ninety-nine percent of total entropy.
Categories: astro-ph.CO