But if we tilted Earth's axis even more, to 90 degrees ... Seasons happen because the tilt points different parts of the planet toward the sun at different times of the year.

Calculate the total area of the curve \(y = {x^3}\) and the \(x\)-axis between \(x = 2\) and \(x = - 2\). When you have a problem where part of the area is above the \(x\)-axis and part is below ...

Notwithstanding the collapse of the Bashar al-Assad regime – also until recently a part of the axis – in Syria, however, our research shows that the axis has historically proven much more resilient ...