The question of whether humanity is alone in the universe has fascinated scientists for generations, but few have pursued an answer as publicly or as controversially as Harvard astrophysicist Avi Loeb. While most researchers argue that extraordinary claims require extraordinary evidence, Loeb believes advanced alien civilisations may already have left technological traces in our cosmic…

Nanobubbles cleaned up the Lincoln reflecting pool: here’s how they could be used on dying seas and lakes zThe Lincoln Memorial Reflecting Pool in Washington, DC has become more than a landmark. It is now a real-world testing ground for nanobubbles, microscopic gas bubbles that can clean water, control algae and may eventually help restore…