The Earth as we know it came into being around 4.5 billion years ago when gravity condensed a mass from the cloud of hot ...

By 2050, over 5 billion people — probably more than half the planet’s population — will be exposed to at least a month of health-threatening extreme heat when outdoors in the sun ...

Let’s take a look at this model. The Sun is a star, a giant ball of burning gas. The heat and light that it gives off helps to keep everything on our planet alive. When we see the Sun moving ...