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There have always been infertile heterosexual couples in need of donor sperm, but with the legalization of gay marriage and the rise of single motherhood, the market has expanded over the past decade. About 20 percent of Spermabanken's…

A patient with Covid-19 breathes oxygen on December 29, 2020 on the Covid-19 ward in Khayelitsha Hospital, about 35 km from central Cape Town.RODGER BOSCH | AFP | Getty ImagesA variant of the coronavirus identified in South Africa is more…

"Most shark researchers think incompletely, not wrongly," he said.One of the co-authors of Dr. Clua, John Linnell of the Norwegian Institute for Natural Research, examines human conflicts with predators on land and admits that he is not a…