Sean Ulm

And what would you do to make a gradual diplomatic decision as to what people would wear?

Billy Griffiths from Deakin University, where he's a senior research fellow and lead author with Sean Ulm and Larissa Berent of the book The First Inventors, launched this week.

Next week, we celebrate another unique Australian icon, the echidna.

And yes, again, much more complex and surprising than we thought.

A big brain built for thinking and physically strong enough to move your fridge, would you believe?

One turned up on our steps, stone steps down the south coast.

And I thought, oh my gosh, I wonder if it's got lost.

And what I'll do is I'll lift it up and put it somewhere else.

I could not lift it.

It must have had suction feet or something.

It's unbudgeable.

And they live a long time, so do they make social parties or groups of them, or do they stay fairly solitary?

Danielle Claude on the amazing echidna, much more surprising than most of us knew.

And also, next week, Belle Smith.

Is this unprecedented?

Brings an ancient sword to the science show.

Could it possibly have once belonged to Lord Nelson?