Why is Elon Musk spending his time on Twitter, not on the mission to Mars?

Then, of course, there is his own personal story – the tall, 51-year-old billionaire with 10 children ranging in age from one to 18. His first son died aged just 10 weeks. Musk, who was born in South Africa, has described living with Asperger’s syndrome, a type of autism, and stated that his main goal in life is to colonise Mars.