In August 1868, the Sun briefly became a laboratory for astronomers gathered in India to watch a total solar eclipse. Among them was the French astronomer Pierre Jules Janssen, who turned a spectroscope towards the bright prominences rising around the eclipsed solar disc. Their light contained a yellow spectral line that seemed to sit close…

Machu Picchu. Image Credit: Draceane/Wikipedia Archaeologists have discovered at least 2.5 kilometres of previously hidden pre-Hispanic roads near Machu Picchu by using lasers to look beneath the dense vegetation covering the landscape. The discovery was made around the Mandor Wall, east of the famous Inca citadel, during a preliminary archaeological survey in July 2026. Instead…