Nasa employees have been directed to remove all pronouns from emails and other applications following an executive order from the Trump administration. In response, Nasa disabled the ability to add pronouns in user displays and mandated uniform signature blocks.

An email seen by NPR says the move is to comply with a presidential order to "restore biological truth" to the government.

On his first day in office, US President Trump signed an executive order titled "Defending women from gender ideology and extremism and restoring biological truth to the federal government," which, among other things,