When we look out at the luminous matter in the Universe -- stars, galaxies, clusters of galaxies and the hot gas in and between them -- it tells a couple of different stories. One is the story of how normal matter (based on atomic nuclei and electrons) comes together to emit, absorb and otherwise interact with light: an indispensable part of how we see the Universe. But another story is that of gravitation. By observing how this matter moves relative to its surrounding environment, we can learn an awful lot about the gravitational interaction in the Universe.
In children with a deletion on chromosome 22, having autism does not boost the risk of developing schizophrenia later in life, according to a new study1. The children in the study have 22q11.2 deletion syndrome, which is linked to a 25-fold increase in the risk of developing a psychotic condition such as schizophrenia. A deletion in the region is also associated with an increased risk of autism.