Methane Breathing Aliens

In 2050, Earth received a signal from an exoplanet. The signal contained audio and when it was played, an eerie and shrill noise could be heard followed by the whirring of machinery. This astonished astronomers and physicists alike. The discovery was kept confidential and space agencies were notified. A year later, Earth received another signal from the exoplanet which also contained audio. This time when it was played, a voice spoke an unknown language in a threatening tone. This alarmed space agencies and progress was made to decode the language in it.

The effort was futile and a permanent solution had to be found. All countries signed a treaty wherein their armies could be used for retaliation against extraterrestrial threats. Later in 2056, the James Webb telescope captured a picture of 550 unidentified space crafts heading towards the Milky Way galaxy. Space agencies and governments were notified and drills were practised. The general public was then told about the threat of an alien invasion. In 2070, a sighting of an unidentified spacecraft was spotted in the asteroid belt of Jupiter and another spacecraft was spotted near the Moon. A hasty decision was made and all troops were stationed on Earth. On 30th December 2071, a disc-shaped spacecraft was found hovering over farmland in India.

5 alien-like creatures equipped with a respirator connected to a gas cylinder were dropped from the spacecraft and left to fend for themselves. They were unarmed and they were unable to bear the weight of the cylinder as they stumbled across the flat terrain. The spacecraft from which they were dropped was tracked and army troops were sent to the farmland. One of the aliens got tired and disconnected the gas cylinder which resulted in the alien not being able to breathe. The alien gasped and died immediately afterwards. The rest of the aliens were shot dead by a passing helicopter and their corpses were taken for investigation. It was found that they needed methane to breathe and needed to carry heavy gas cylinders to breathe. The humans knew exactly what to do next.