One of the urgent questions following Stuxnet's discovery was the identity of it's target. When this was finally revealed, it also exposed the extent of it's creator's brilliance.

When it was discovered in 2010, Stuxnet was the most complicated and sophisticated malware ever known. The Stuxnet attack was a terrifying display of cyberwarfare and jarring proof of concept.

Dr. Timothy Leary help kickstart the LSD's involvement in the Hippie movement of the 1960's - and was imprisoned for it. But what really makes LSD so dangerous? We'll delve deep into the effects of LSD on the human brain.

When Albert Hofmann accidentally discovered Lysergic Acid Diethylamide – LSD – he hoped that the unusual compound would help psychiatrists treat patients by inducing ‘temporary insanity’. It was the CIA who tested the LSD’s mind-bending potential as a psychological weapon, in a top-secret and horrifically cruel series of experiments known as MKULTRA.

In the 19th century, two brave (and some might say - insanely brave) French physicians took to the streets of Hong Kong and Bombay, and risked their own lives in the name of ridding Mankind - and the fleas - from their worst nightmare: The Black Death. This is their story, and the story of the humankind's bitter enemy throughout the ages: the Bubonic Plague.

The male Y Chromosome holds tantalizing clues about our own, personal past - but that past can turn out to be very troubling. Tatiana Zerjal's research on DNA samples brought by Spencer Wells from central asia revealed uncomfortable truths, such as the extent of rape and murder in Genghis Khan's Mongol empire. Do we really want to know the secrets our DNA holds?

It's a Paleoanthropological mystery: Earth was once home to many different Human Species - from Homo Erectus to the Neanderthals. Yet today, they are all gone. When and how did the other humanoids disappear? The answer is hidden, of all places, in out DNA.

When Life Insurance was invented, poisoning became a plague in Victorian Britain. For many women, the poison of choice was Arsenic. What made the 'inheritance powder' the perfect murder weapon? (Note: This episode is not recommended for young children)

In the 1980's, the British BBC invested millions of pounds on what should have been a technological marvel: a modern version of the famous medieval Domesday Book. Less then 15 years later, it's system was unusable. What can we learn from the Domesday failure?

In 1941 the British and Canadian navies managed, with great effort, to turn the tide and curb the U-Boats threat in the North Atlantic – but Admiral Dönitz was about to introduce a new kind of U-Boat – one that would deal a deadly blow to the British, American and Canadian forces. Type 21, AKA - Elektroboote.

How did the small, outgunned German fleet manage to strike painful blows to the Great British Navy? The credit for this success belongs to the German flotilla of submarines: the Unterseeboots, or U-Boats.

In 1895, Wilhelm Röntgen was an honored and admired physics professor. But reputation aside, Röntgen was 50 years old - and at that age, it is rare for a scientist to make a significant contribution to his or her field.