After four years of research, the release of official conclusions left many unsatisfied. Both buildings were designed to survive the impact of a commercial airliner and the fireproofed steel structures should have survived the fires that followed - yet within two hours both towers had collapsed. In addition, video footage of molten metal pouring from the damaged floors and eyewitness reports of explosions before the collapse were not addressed fully, fuelling conspiracies of a government plot to destroy the towers and drag America into a war on terror. Retired chemist...

During a three-month period in 1888, a knife-wielding serial killer murdered six women on the streets of Whitechapel. Their throats were cut and their bodies horribly mutilated. He was never caught and his identity remains one of the world's greatest crime mysteries. In the years that have passed since Jack the Ripper's killing spree, many high-profile suspects have been suggested, yet the fact remains that none of them can be placed at any of the crime scenes. Now, journalist Christer Holmgren believes that he has found a suspect who can not only be linked directly ...

Tales of a monster haunting Loch Ness go back for nearly 1,500 years, but only in the last century did the legend truly take off. Since the 1930s, over 1,000 eye witnesses have used mysterious photographs, eerie videos and unexplained sonar readings to back up their accounts of seeing the beast. The evidence is always tantalising but never definitive. At St Andrews University, Dr Charles Paxton, an expert on large marine creatures, has now compiled a unique database of every sighting of the creature ever reported. His team hope through detailed analysis of this ...

The Sierra Nevada has one of the most beautiful and dramatic landscapes in America. It is a land of extremes - from mountain peaks to scorching deserts - and the ultimate destination for thrill seekers. The Sierra Nevada is also a graveyard for over 2,000 crashed planes, including that of billionaire adventurer Steve Fossett. This is over 20 times more than the number believed to have been lost in the Bermuda Triangle. UFO expert Jeff Gonzales believes that the answer lies in the notorious Area 51. Rumours of captured alien technology have persisted since the Roswell ...

A giant ape-like hominid is said to live in the forests of North America. Eyewitnesses claim that it is up to ten feet tall and covered in foul smelling, brown fur. Shy and elusive, despite sightings over many centuries, the beast defies capture and no conclusive proof of its existence can be found. Some say it is a myth while others believe that it is a prehistoric relic, a distant cousin of humans that has somehow evolved beside us in the shadows. Stories of a giant walking creature have been told for centuries in the remote landscapes of Tibet and North America but...