'Super-Earths' may not be so rocky after all

So-called super-Earths - rocky exoplanets much larger than our own - may actually be more like mini-Neptunes.

First anniversary of Neptune's discovery

It's exactly one year since Neptune was discovered - one Neptunian year, or 165 of our own rather shorter ones.

World's business data nears ten zettabytes per year

We're a talkative species (some more so than others - ed.), but even so, it's something of a surprise to see just how much information's being exchanged every day on the internet - 9,570,000,000,000,000,000,000 bytes per year, to be precise.