Donald is curious about finding the answers to this question.
"The Earth has been through many ice ages and even been a 'snowball' with life existing in the oceans. Obviously, the liquid ocean must lose volume as more water is trapped in ice and on land, though exactly the amount is difficult to know exactly. Is there a record of the Earth's ocean's salinity in the geologic record? And can the amount of liquid water be calculated from that record. And at the most extreme, how much of the Earth's water was ice when it was a snowball? And at what time was the living biomass greatest? What is the limiting element that restricts biomass among H, C, K, N, P, O, or is it available liquid water?"
Donald wants to find the answers to this question that he submitted to The Naked Scientists
"Certain ants farm fungi, other ants milk aphids. Certainly, these are behaviours that are now generational. Can scientists determine whether this behaviour is passed on by learning or is it instinctive in a collective of ants reared away from their colony?"
Listener Francis is interested in finding answers to this question.
"During the planning process for Japan's round-trip to the asteroid Ryugu was there any discussion of leaving any sort of instrument on the asteroid to take photos and collect data as it continued on it's journey? Does anyone have plans to use an asteroid or comet as a vehicle to survey the farther reaches of our solar system?) If we have enough time to locate an astronomical vehicle, build a probe and intercept, why not hitchhike?"
What do you think? Leave your answers in the comments below...
Alaster encountered this problem in his car when travelling from Cape Town to the UK and wondered if there was a scientific explanation for this problem.
"The electricals in my car stopped working after it was transported via shipping container from Cape Town to the UK. I think there was a fault in the scanner in Cape Town. My question is, how does a container scanner work? Can it damage the electrical components within cars?"
What do you think? Discuss in the comments below...