Modern Marvels: Halloween

Go behind the scenes at Knott's Berry Farm's 35th annual Halloween Haunt to learn how to apply Hollywood-grade monster makeup, how fake blood is manufactured, and which costumes are instant contest winners.

Candy is America's sweetest guilty pleasure. Find out the ingredient that gives Lemonheads their sour punch, the substance that puts the polish on Mike and Ikes, and more mouth-watering confectionery secrets.

All it takes to set off a booby trap is an unsuspecting victim and a harmless-looking object. Explore their history, from the ancient Egyptians, Chinese, Greeks, and Romans to the modern War on Terror.

Designed like defensive machines, medieval castles represented the perfect fusion of form and function. Journey back to that unruly era to examine the complexity of their construction and many uses.

More than 2 million people die in the U.S. each year. That works out to about 5,500 burials a day. Take a look at dealing with the dead throughout the centuries - and at today's $20 billion funeral industry.

Explore the tech developed to create and respond to doomsday threats ranging from very real (nuclear arsenals) to controversial (global warming) to futuristic (nanotechnology, cyborgs, and robots).

Examine more threats - both natural and man-made - that may endanger civilization. From the far reaches of space to tiny viruses, doomsday sources are many, but so are technologies used to keep the chaos at bay.

Discover how essential space travel technologies have journeyed back to Earth with surprising and indispensable commercial applications.

For more than 3,000 years, emperors, dictators, police, criminals, and even clerics have created a vast array of torture devices. A medical doctor reveals how the human body responds to their use.