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When it comes to how to improve sperm count, remember that if sperm were deeper inside the body, and therefore at body temperature, they would be overactive and burn themselves out. Humans have external testicles to keep sperm cooler and dormant. When they enter another body, they reach the temperature needed to get active. To …

There may be many lifestyle factors affecting sperm count and quality. Among those not discussed are alcohol, nicotine and anabolic steroid use. The problem with correlating sperm data with these factors in a large survey is that an honest admission of the degree of consumption may be difficult to obtain. In addition, stress can have …

Has anyone considered that the decline in sperm count and quality could be an attempt by Gaia to reduce the population of a harmful species? Perhaps Gaia is experimenting with gene drives in Homo sapiens in the same way that we have in mosquitoes, to make the vast majority of males infertile.

Why is NASA wasting time and resources on commercial supersonic flight? Is it simply a demonstration of engineering ability? Such flight will only satisfy the egos of the super-rich, while helping to trash the environment for the rest of humanity. When Concorde was conceived in the mid-1900s, there was a need to speed up the …

Stuart Hameroff and Roger Penrose's proposal that gravitational instabilities cause "collapse" of quantum wave functions in intracellular microtubules in the brain seems like a leap. To go from that to Penrose's suggestion that each time a quantum wave function collapses in this way in the brain, it gives rise to a moment of conscious experience …

In reading about how to solve the black hole paradox, assuming that all of the physical problems of making a measurement within an atom's width of an event horizon were overcome, then how long would it take to make such a measurement, given the time dilation effects of being so close to a supermassive black …

Historical life expectancies reflect infant and child mortalities much more than adult lifespan. In other words, a woman who had lived until menopause at 50 would probably live for 20 more years to the biblical three score and 10. So, while I am not denying the value of grandmothers (let's be clear that we benefited …

"Mysterious you" presents a fascinating argument for the evolution of menopause in women. However, the question remains why evolution has permitted men to continue the possibility of procreation into older age. Perhaps it has done its best to hamper this with a shorter lifespan.

Roger Penrose and Stuart Hameroff propose that consciousness arises when a gravitational field causes quantum wave functions in microtubules in our neurons to collapse, so-called orchestrated objective reduction. The gravity on the moon is a sixth of that on Earth. So, if the idea were correct, we would have expected to see consciousness changes in …

The shortcomings of using hydrogen as a fuel that were summarised in your article, relating to efficient and stable storage and transport, can be addressed by using chemicals that combine with the hydrogen, called liquid organic hydrogen carriers. These were successfully trialled during the recent European Union-funded HySTOC project. In addition, the technology relating to …