This may explain the strange properties of the orbits of our solar system's planets, which are not quite perfectly circular, and all lie on slightly different planes. "[T]he puzzle for theoretical ...

100,000 km deep in space': NASA detects eerie birdsong that could ... Asteroid Bennu’s salts may hold clue to a billion-year-old puzzle 'Bryan Johnson's organs': A 64-year-old ear, but an ...

"We are the first mission to be able to track space weather events in three dimensions routinely across the solar system ... There's also a big puzzle concerning how the solar wind, which ...