Problem-solution essays are pieces of writing that unveil a certain problem and offer different ways of solving it. But how do you write such essays? An essay usually consists of four key components: ...

For many business people, writing poses a challenge, especially when a problem-solution letter is at hand. It might help to think of the task you face as inherently optimistic. Not only are you ...

The Bernese theoretical astrophysicist Kevin Heng has achieved a rare feat: On paper, he has derived novel solutions to an old mathematical problem needed to calculate light reflections from planets ...