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Flickr/Kelly Teague

Curious Kids: why is there gravity?

There is a reason why it’s easier to roll marbles down rather than up a hill. And the answer (to this and to gravity itself) is all about acceleration.

‘Suck it and see’ or face a digital tax, former ACCC boss Allan Fels warns Google and Facebook

‘Suck it and see’ or face a digital tax, former ACCC boss Allan Fels warns Google and Facebook The Conversation, CC BY41.3 MB (download)
Tech giants don't like Australia's plan to force Google and Facebook to pay for news, to fund public interest journalism. But the government may well respond with a digital tax, says Allan Fels.
Worker bees with capped brood (brown), open brood (white larva), all sorts of coloured pollen and shiny fresh nectar. Cooper Schouten

Curious Kids: how do bees make honey?

A single colony of bees can have 60,000 bees in it. Together, they can visit up to 50 million flowers each day to collect pollen and nectar. They’re not called ‘busy bees’ for nothing!