The colors of the auroras largely depend on the composition of the gases in our atmosphere. For example, oxygen at high altitudes emits a nice...
At high altitude, there is not "less air" as one might sometimes hear, but the air is simply less dense. This means that the air...
The colors of the northern lights mainly come from the different gases present in our atmosphere. Oxygen is largely responsible for those famous green and...
Our planet is tilted at about 23.5 degrees from its vertical axis, and this has enormous consequences. This little detail is enough to completely change...
The weather vane is a very simple device: it has an arrow mounted on a vertical axis, capable of turning freely according to the direction...
Hot deserts like the Sahara or Kalahari are mainly found around latitudes close to the tropics, where the sun beats down heavily all year round. These regions...
Inside a thundercloud, ice crystals and water droplets frequently collide. As a result, they exchange electrical charges, somewhat like a balloon rubbed against a wool...
When you ascend to higher altitudes, atmospheric pressure decreases. This change means that oxygen molecules become scarcer with each breath. As a result, your body...
Our planet orbits the sun at a slight tilt of about 23.5 degrees. This tilt explains why during winter, the northern hemisphere is oriented away...
In a thundercloud, strong turbulence causes ice crystals, water droplets, and particles to collide. These collisions create a separation of electric charges: negative charges generally...
