Computer simulations gave new life yesterday to a theory that has intrigued astronomers for years: the idea that one big collision between the Earth and a Mars-sized planet gave birth to the moon. The ...

2:09 A closer look at how collision reconstruction investigations work “There’s a lot of physics, a lot of math that we do,” York Regional Police Det. Const. John Paterson, a qualified engineer-turned ...

Scientists warn that Earth may have only a narrow window of less than three days to avert a cascading satellite disaster if a ...