From the Ordovician period to present day where we may be experiencing a sixth mass extinction, here are the mass extinctions that repeatedly wiped out life on Earth. ...read more
Running a household takes an emotional and cognitive toll. And when there is imbalance in chores, it can creep into our inner world, creating mental load. ...read more
The energy of the vacuum should have a gravitational effect on large atoms. But physicists' attempts to measure it have puzzlingly come up empty. ...read more