This week Nasa announced its evidence of liquid water on Mars and coincidentally, Matt Damon's action flick, The Martian, hits cinemas here. The timing is uncanny.

A tax on our saltiest, fattiest foods and cutting the price of fruit and vegetables would encourage people to choose healthy options, writes Dylan Throne.

Crowd-funding sites, such as Givealittle, are built on trust. When you donate to a cause, you trust that the cause you're donating to is real, writes Rosie Dawson-Hewes.

I can never quite understand why it so often takes people so long to get around to checking their ticket, writes Amy Wiggins.