A study suggests that several species of brown algae may have independently evolved to express both sexes simultaneously, and it’s likely that female algae evolved male traits—not the other way around.

Off the western Australian coast, in Shark Bay, a field of seagrass big enough to cover Washington, DC, has flourished for more than four millennia, a new study finds.

The accidental finding marks the first time a phenomenon called cytoplasmic sterility, known to occur in plants, has been found in animals.

The University of East Anglia researcher was best known for his contributions to the study of sexual selection, particularly post-copulatory sperm competition.

In human male-female pairs with a less similar suite of genes for human leukocyte antigens, sperm fare better when exposed to cervical mucus.

Funnel-web spiders change the timing of their distinct courtship behavior depending on what microbes they’re carrying.

Videos reveal how a female squid fertilizes her eggs—one at a time and without spilling much stored sperm.

Sex-deprived males seek out alcohol.

Researchers identify a C. elegans gene that leads the organelles to self-destruct in sperm following fertilization of an egg.

Legal expert Henry Greely envisions a world in which advances in biotechnology obviate the need for sexual reproduction as we know it.

This year’s awards honor research on bee stings, appendicitis, kissing, and more.

Female fruit flies challenged with infection during their lifetimes have offspring with greater genetic diversity.

Scientists mutate a mating pheromone and its corresponding receptor in yeast to promote speciation.

A federal advisory panel supports the US Food and Drug Administration’s approval of the first drug for female sexual dysfunction.

A newly described amphibian species engages in internal fertilizations and gives birth to tadpoles.

The genitalia of mammals and reptiles develop from two different tissues, but the structures share common genetic programs and molecular induction signals.

STAP retractions; comparing SCNT-derived stem cells with iPSCs; malaria-infected mice more attractive to mosquitoes; stem cell banks face business challenges

Sex on Earth, Wild Connection, The Classification of Sex, and XL Love

July 2014's selection of notable quotes