The testicle (frae Laitin testiculus, diminutive o testis, meanin "witness" o virility, plural testes) is the male gonad in ainimals. Lik the ovaries tae which they are homologous, testes are components o baith the reproductive seestem an the endocrine seestem. The primary functions o the testes are tae produce sperm (spermatogenesis) an tae produce androgens, primarily testosterone.
- In mathematics, the Fields Medal (picturt) is awairdit tae Caucher Birkar, Alessio Figalli, Peter Scholze an Akshay Venkatesh.
- A 6.4 magnitude yirdquauk strikes Lombok, Indonesie, killin at least 16 fowk.
- In cycling, Geraint Thomas wins the Tour de France.
- Follaein allegations o sexual misconduct, American Airchbeeshop Theodore McCarrick acomes the first cleric tae resign frae the College o Cardinals syne 1927.
- The langest tot lunar eclipse in the 21st century occurs.