Spying doorbells, political-architectural intrigue, rogue chatbots, and cats on chairs – welcome to this week’s Design Line.

Scientists have found a way to build a base for life on Mars – using astronauts’ bodily fluids to make concrete out of alien dust.

Founded in 1958, the DSN is the Earth’s most sophisticated means of interplanetary exchange – the system by which NASA passes telemetry data between Earth and its spacecraft.