A vast peat bog discovered in a remote area of Congo-Brazzaville in Africa. The bog containing billion of tonnes of peat is present on an area of the size of England.

Researchers are excited about the finding and thinks the investigation can reveal about 10,000 years of environmental change in this region. Dr Simon Lewis, from the University of Leeds said still there are certain areas in the world that are uncharted territories.

It is not at all easy to work around these places and this is one of the reasons that few people enter into such swamps. Satellite images gave a hint about the presence of massive tropical peatland. But it was the expedition that kicked off from Itanga village in April that confirmed its presence.

"You can only walk on these areas for a couple of months a year, right at the end of the dry season, so you have to time it right", said Dr Lewis. This is the reason that researchers had to contend with dwarf crocodiles, gorillas and elephants as they explored the area.

Research team was inside the swamp for three weeks. The only time when their feet were dry was the time when they used to sleep in their tents. To place the tents also, they needed platforms as the ground was water-logged.

The bog would be covering around 100,000 to 200,000 square kilometres of the area with the peat-layer reaching up to 7m beneath the ground. What makes this finding a unique one is most peatlands are in the cold zones as slow conditions are required for the decomposition. Such is not the case with the recent find.