  Two new high-precision measurements of the deuterium abundance from absorbers
along the line of sight to the quasar PKS1937--1009 were presented. The
absorbers have lower neutral hydrogen column densities (N(HI) $\approx$
18\,cm$^{-2}$) than for previous high-precision measurements, boding well for
further extensions of the sample due to the plenitude of low column density
absorbers. The total high-precision sample now consists of 12 measurements with
a weighted average deuterium abundance of D/H = $2.55\pm0.02\times10^{-5}$. The
sample does not favour a dipole similar to the one detected for the fine
structure constant. The increased precision also calls for improved
nucleosynthesis predictions. For that purpose we have updated the public
AlterBBN code including new reactions, updated nuclear reaction rates, and the
possibility of adding new physics such as dark matter. The standard Big Bang
Nucleosynthesis prediction of D/H = $2.456\pm0.057\times10^{-5}$ is consistent
with the observed value within 1.7 standard deviations.

Cosmology and Nongalactic Astrophysics