Another example of the ubiquity of ‘right’. The article is not about the brain growing as a right as opposed to a left brain. It is simply about about brains develop.

For decades, many scientists have thought that a single type of starter cell gives rise to the entire brain. But experiments now challenge that fundamental picture, providing evidence that it takes not one but two flavours of progenitor cell to make the complex organ1.

The new study suggests that two types of precursor cells are required to build the brain, challenging a decades-long theory that a single type of starter cell gives rise to the complex organ. The research finds that one type of precursor cell forms the hindbrain, while another generates the forebrain and midbrain. Not all researchers are convinced by this conclusion, but the work has drawn broad praise for one aspect: the authors found an efficient way to coax stem cells to grow into hindbrain motor-neuron cells, which could aid research into conditions that affect these cells, such as amyotrophic lateral sclerosis (ALS).

Nature briefing 21/09/2026

The hegemony of the right, yet again?