This time, Kevin asked why line drying makes clothes rougher and stiffer than tumble drying...
Would a scattering of your beloved's ashes be good for plant growth? Or could it be toxic?
We find out if street lights are affecting nature. Plus we ask, what is the tallest mountain possible?
Is artificial photosynthesis possible? If it's achieved in the lab, would it benefit mankind?
Is it possible to recreate the conditions found on Mars down here on Earth?
Is making vitamin D akin to human photosynthesis?