Science + Technology – Analysis and Comment

Salt seems common enough, but it has some astounding properties. Shutterstock

Kitchen Science: A salt on the senses

That salt on your table can do amazing things chemically, and to the flavour of your favourite food. But don't eat too much!
It’s not the first time attempts have been made to block WhatsApp in Brazil. Chonlachai Panprommas/Shutterstock

Why is Brazil trying to block WhatsApp?

It's a battle of online privacy versus a crackdown on crime, but is a total ban on the popular app, WhatsApp, the right way to go?
Tablets were not invented when the original rules on screen time for children were developed. Shutterstock Angela Waye

Is two hours of screen time really too much for kids?

Children's use of screens for fun and education have changed a lot over the years, so why haven't the rules on acceptable screen time kept up?
On the hunt for other cultures. Shutterstock/Gorosi

What does an anthropologist actually do?

Ask any anthropologist what they do and they will find it hard to give you a direct answer. But it ultimately comes down to studying people and their culture.
The French submarine, Shortfin Barracuda, designed by the DCNS group, to be the design base for Australia’s new fleet. AAP Image/DCNS Group

What do we want from Australia’s new submarines?

Australia's new submarine fleet will be designed for a range of different missions in our challenging maritime environment.
The DCNS Shortfin Barracuda is a large submarine, but that might suit our needs. AAP/DCNS Group

Why does Australia need submarines at all?

Submarines possess a number of unique capabilities that make them ideal to protect Australia's interests.
Do the holes in the banner carried by these Vietnam veterans during an Anzac Day parade in Canberra make any difference? AAP Image/Alan Porritt

Do wind vent holes in banners make a difference? We used a wind tunnel to find out

Attend any ANZAC Day parade and you might see people carrying banners with holes cut in them. They're supposed to cut any drag or wind resistance but do they do any good?