9:30 am - 10:00 am
Trees are solid and dense. However, they’re made from air. Wait, what?
When you pick up a seashell and hold it to your ear, why can you hear the sound of the ocean?
Spiders dropping down on their silk thread never get caught twisting in the breeze, like abseiling commandos do. Because … chemistry.
How did Russian gamblers cheat US casinos out of millions of dollars? Dr Karl explains their scam – and the Australian connection.