Are humans running out of sperm?

You know that feeling when time and space melt away and new ideas seem to flow through you? Neuroscientist Heather Berlin explains what we know about how creative flow states might change the way the networks in our brains interact. Guest: Heather Berlin, author of The Fine Art o ...  Show more

Spider silk can be stronger than steel by weight and tougher than Kevlar. Can scientists make their own? Guest: Greg Holland, professor in the Department of Chemistry and Biochemistry at San Diego State University For show transcripts, go to ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠vox.com/unxtrans ...  Show more

James Gallagher get's behind the hype to find out if sperm counts are really falling? There are plenty of headlines telling us they are, but also scientists who disagree - he unpicks the evidence with two of them. James also gets his own sperm sample analysed and meets a couple w ...  Show more

James Gallagher investigates whether there is a decline in male sperm including the results of his own sperm count analysis. He meets a couple who conceived after having treatment for a varicocele, enlarged veins in the testes that can heat the sperm up and the leading known caus ...  Show more

Reproductive science has come a long way in recent years, but there's still plenty we don't understand - particularly around male fertility. The reliability and availability of data in this field has become more of a concern in light of a study published this year, suggesting tha ...  Show more