Space Debris

Just 40% of the total satellites that orbit the Earth are active, whilst the remaining 60% amount to useless metal shooting around the planet at speeds of 28,000kph, ten times faster than the speed of a bullet. However, inactive satellites are just a small fraction of the problem. Russia recently destroyed one of its ownContinue reading “Space Debris”

The Physics of Ice Ages

1.5 million years ago, the Earth experienced its most recent ice age, namely the Pleistocene glaciation. An ‘Ice age’ is a period, which can be as long as hundreds of millions of years, during which the global temperature is abnormally low. How cold exactly? Imagine the Chicago skyline under almost 3km of ice; that’s whatContinue reading “The Physics of Ice Ages”