Neuroscientists are exploring whether shapes like squares and rectangles — and our ability to recognize them — are part of what makes our species special.
Researchers describe a link between genetic relatedness and sophisticated tool use in primates in East and Central Africa, suggesting their culture is cumulative.
President-elect Donald J. Trump joined Elon Musk, as his company’s prototype moon and Mars rocket carried out a sixth test flight that showed a mix of progress and setbacks.