Self Improvement Wednesday

When and how was it discovered fluoride was good for your teeth?

How do we know we are real? How do we really know we're here? These were the kinds of questions that consumed 17th century French philosopher Rene Descartes.

Each week on Self Improvement you get to learn something new - this week's less is the amazing diversity of frog mating strategies. Your teacher is Dr Jodi Rowley, curator of Amphibian and Reptile Conservation Biology at the Australian Museum.

At the heart of every early colonial building in Sydney there is a convict story. The Rum Hospital has a surprisingly dark and brutal one.

Elizabeth Ann Macgregor, Director of the Museum of Contemporary Art, on the fascinating career of Alberto Giacometti

How can something brainless be so brainy? Join Dr Eliza Middleton from the University of Sydney for this week's Self Improvement lesson.

Rest and relaxation looked a little different in the Ancient World.

Each day at twilight a variety of atmospheric and astronomical phenomena reveal themselves.

Australia has the worst extinction record of any continent with more than 20 species of our small to medium sized mammals gone and many others declining.

But what if we could fast track evolution? Would it help conservation efforts?

Why the world needs seaweed