And how do we know?
What makes weeds so relentless?
It's all about the ions...
How do we find water sources hidden deep underground?
Theoretically, it's millions of digits long...
Is there a future for wearable computers?
Cracking the code of code machines...
What effect could declining bee populations have on plants?
Could hyperloops make commuting a thing of the past?
Could it spin forever?
Bobby Seagull from University Challenge tests our sci-fi knowledge...
Why do some plants eat animals when others get their energy from the sun?
If we could photosynthesise, Mark asks, how much green skin would we need to make enough energy to live our normal...
Does washing up liquid leave behind toxic residue on our dishes?
Should we be scared?
Is it the same as humans?
And if so what can we do about it?
How do we know what to do?
Can little things eat bigger ones?
What does science say we should do to be happy?
Can exposure to light change our body clock?
We put our panel through their paces with a summer-themed quiz!
Can we even compare the two events?
Is there anything we can do about it?
Did two artificial intelligences really invent their own language?