100 years of the Cosmological Constant: what's next?
  The Cosmological Constant $\Lambda$, in different incarnations, has been with
us for 100 years. Many surveys of dark energy are underway, indicating so far
that the data are consistent with a dark energy equation of state of $w=-1$,
i.e. a $\Lambda$ term in Einstein's equation, although time variation of $w$ is
not yet ruled out. The ball is now back in the theoreticians' court, to explain
the physical meaning of $\Lambda$. We discuss sociological aspects of this
field, in particular to what extent the agreement on the cold dark matter +
$\Lambda$ concordance model is a result of the globalization of research and
over-communication.
