Lab confirms first case of coronavirus reinfection in the US
Space and Ufo
New quantum paradox throws the foundations of observed reality into question
Is the Y chromosome dying out?
How long is a galactic year?
Black hole ‘hair’ could be detected using ripples in spacetime
How to build a universe after a big bounce
The end of the universe may be marked by ‘black dwarf supernova’ explosions
Clouds of star-forming gas are being shot ‘like bullets’ across the galaxy
Rainbow meteorite discovered in Costa Rica may hold building blocks of life
How Earth’s gravity changed record-breaking asteroid’s path forever
Did alien tech visit our solar system? The natural explanation for ‘Oumuamua may have an important flaw
What does the Pentagon’s new UFO task force mean? Experts weigh in.
NASA powers up Ingenuity helicopter on Mars for the 1st time
Astronomers bounced a laser off a spacecraft whirling around the moon
Why doesn’t the US use the metric system?
