The once-celebrated edtech giant is now battling insolvency, lawsuits and regulatory scrutiny, with a takeover bid arriving ...

How fast and in which direction is our solar system moving through the universe? This seemingly simple question is one of the ...

The way we speak about time tends to strongly imply that the passage of time is some sort of real process that happens out ...

This paper describes the eccentricity, amplitude, phase shift, angular momentum, polarization, radial path, and orbital ...