E l o n makes a Mars joke. Heaps of science Twitter: https://t.co/oTCs4wJUpr 1 atbildes

	Signe Dean (2019-06-24 06:26:25) @twitter	E l o n makes a Mars joke. Heaps of science Twitter: https://t.co/oTCs4wJUpr
	Signe Dean (2019-06-24 06:26:45) @twitter	Context: https://t.co/rAnVXS31an