Image copyright Canadian Space Agency

What was your biggest achievement at the age of 15? Well, a Canadian teenager may have outshone the experts after discovering a lost Mayan city. William Gadoury, from Saint-Jean-de-Matha, Quebec, made the discovery by comparing star charts with satellite images. The new city, discovered in a Mexican jungle, is thought to be the fourth biggest Mayan city, and has been named 'Mouth of Fire' by the teenager.

The revelation went viral after a report on the findings was posted on Reddit - with hundreds of commenters amazed by the teenager's discovery.

Image copyright Reddit

Image copyright Reddit

William has been fascinated by the Mayans for much of his childhood, ever since a Mayan calendar predicting the 2012 apocalypse sparked his interest.

His hobby eventually turned into serious research. The imaginative youngster theorised that the locations of Mayan cities might correspond to stars in Mayan constellations. He analysed 22 Mayan star maps from ancient books (known as the Madrid Codex), and overlaid the star positions onto Google Earth images of the Yucatan Peninsula. He was able to show that the 117 Mayan cities did indeed match the star positions, with the brightest stars representing more major cities.

Image caption A Mayan pyramid in the ancient city of Comalcalco

William then overlaid a 23rd constellation, finding a discrepancy; three stars but only two known ancient cities. The location corresponding to the third star was on the Mexico-Belize border. But the as-yet undiscovered city was covered in thick vegetation, making his findings inconclusive.

Thankfully, the teenager had a close relationship with the Canadian Space Agency (CSA) - he had won a science competition a year earlier for his theory - and they had already been providing him with images from their RADARSAT-2 satellite, which has cutting-edge terrain mapping abilities. They gave him images of the new location.

Image copyright Canadian Space Agency Image caption A radar image taken by RADARSAT-2 shows a square, man-made structure in the Yucatan Peninsula jungle

He also scoured the internet for other satellite images from 2005, when a fire had engulfed the area leaving it more exposed - and any remains more visible.

Armed with his images, he then collaborated with Remote Sensing expert Dr. Armand Larocque from the University of New Brunswick. By studying the satellite images and applying digital image processing a fascinating discovery was made; LaRocque concluded that the 15 year old had found a major city with 30 buildings and a large pyramid.

His findings have been met with widespread praise, with scientists from the Canadian Space Agency describing his work as 'exceptional'. They also presented him with a medal of merit.

William named the city K'ÀAK 'CHI' which means Mouth of Fire.

So what next for William? He plans to go to the International Science Fair in Brazil in 2017 to present his findings. He also hopes that archaeologists will visit the site very soon. On the possibility of an archaeological dig, Rocque is realistic, telling The Montreal Journal "It's always about money. An expedition's costs are horribly expensive".

Regardless, William's legacy will almost certainly be etched into history. According to reports, the findings are soon to be published in a scientific journal, and it is thought that methods similar to his could lead to the discovery of more lost Mayan Cities.

Update: Since publication of this article some other experts have expressed scepticism at William's findings. Dr. David Stuart, an anthropologist from The Mesoamerica Center, University of Texas posted a response on Facebook claiming 'ancient Maya didn't plot their ancient cities according to constellations'. Stuart - an expert on the Maya Civilisation - described the square feature as an 'old fallow cornfield'.

Blog by Alex Dackevych

Next story 'I'm in charge of worrying' - Teachers taking the stress out of Sats tests

Image copyright @bucklebury_sch / Twitter Image caption Teacher Mrs Thom's note to her pupils ahead of Sats this week

How some primary school teachers are trying to remove the fear being felt by pupils ahead of their big exams. READ MORE

You can follow BBC Trending on Twitter @BBCtrending, and find us on Facebook. All our stories are at bbc.com/trending.