Back pain - almost all of us has either had it or will experience it in our life time.
One hundred years ago, Einstein's theory of General Relativity was announced to the world.
For Mental Health Week 2015, Catalyst looks at technology that can see and hear depression and the use of brain stimulation as a treatment.
Madison Stewart is a young woman with a passion for a creature of the deep that strikes fear in the hearts of most people - sharks.
Sudden unexplained death is the cruellest of killers, striking at random and leaving loved ones distraught and without answers.
The great white shark is widely regarded as the 'top predator' of the world's oceans. Massive, fast and lethal, it would have little to fear from any other animal in the sea.
Saltwater crocodiles are fearsome predatory giants. Flatback turtles are some of the most hard-nosed sea turtles in the ocean.
The fires that tore through the Victorian bush on 7 February 2009 were terrifying and devastating for the people living in the midst of them.
In I Can Change Your Mind About Climate two passionate, intelligent and successful Australians, former senator Nick Minchin and youth activist Anna Rose, separated by a generation, and divided by t