Vets often grapple with the moral dilemma of when a client wants to kill an inconvenient pet. Clients might, for instance, hint that caring for the pet has become too much trouble, or that it interferes with their lifestyle or living situation. This is called...

We often think of black holes as one-way valves that consume everything they come across. But they are also powerful engines that emit radiation and drive energetic jets out into the cosmos.

In research published in the journal Nature, we looked at...

The Perth studio audience of undecided voters gave the campaign’s first debate to Bill Shorten by a decisive margin.

Of the 48 present, 25 thought the opposition leader won, 12 believed the night was Morrison’s and the rest were undecided.

In my opinion, the outcome was less clear cut. I’d score it pretty evenly. Shorten had more...