The ages of globular clusters appear older than the universe.

The ages of globular clusters appear older than the
universe.

Even though the data have been stretched in the direction toward
resolving this since the “top ten” list first appeared, the error bars on
the Hubble age of the universe (12±2 Gyr) still do not quite overlap
the error bars on the oldest globular clusters (16±2 Gyr). Astronomers
have studied this for the past decade, but resist the “observational
error” explanation because that would almost certainly push the
Hubble age older (as Sandage has been arguing for years), which
creates several new problems for the Big Bang. In other words, the
cure is worse than the illness for the theory. In fact, a new, relatively
bias-free observational technique has gone the opposite way, lowering
the Hubble age estimate to 10 Gyr, making the discrepancy worse
again. [22,23]