What happened to the mysterious "first bullet" from JFK's assassination?

Can scientists unravel the mysterious phenomena that lurk between Earth and space? Airing November 20 at 8 pm on PBS

A company called Alcor freezes dead people, hoping to restore them to health one day.

A new high speed camera can capture light in motion and see around corners.

A project called DETER allows researchers to practice fighting cyber crimes.

Could shellfish beds protect New York from flooding?

A new drone doesn't fly like an airplane or helicopter—it flaps its wings like a bird.

Host David Pogue travels the globe to explore new technologies inspired by Nature.

Can modern forensic science uncover fresh clues about the assassination of JFK? Airing November 13 at 9 pm on PBS

The asteroid that exploded over Siberia—injuring more than 1,000 and damaging buildings in six cities—was a shocking reminder that Earth is a target in a cosmic shooting range. From the width of a football field to the size of a small city, these space rocks have the potential to be killers. In a collision with Earth, they could set off deadly blast waves, raging fires and colossal tidal waves.

Host David Pogue tries to find out if there are physical limits to how fast we can go.

With just a few simple tools, anyone can turn a cockroach into a tiny controllable 'bugborg.' Why would you want to? It turns out that these nasty pests could turn into life savers in the future. For media credits, visit: pbs.org/nova/tech/cockroach-cyborgs.html

Move over peanuts, there’s a new packaging material in town—and it’s made of mushrooms.

In October 2012, superstorm Sandy cut a path of devastation across the Caribbean and the East Coast, killing hundreds and doing tens of billions of dollars in damage. Now, one year after Sandy’s deadly strike, NOVA follows up on its 2012 film “Inside the Megastorm” with a fresh investigation of the critical questions raised by this historic storm.

For generations, the Dutch have regarded the water surrounding them as an enemy, building dams and dykes to fend it off. But with climate scientists predicting sea level rises and increased flooding, some engineers are taking a different approach. Their solution? Floating buildings, which work with the water rather than against it, creating a real-life water world.

Cold is the new hot in this brave new world. For centuries we've fought it, shunned it, and huddled against it. Cold has always been the enemy of life, but now it may hold the key to a new generation of science and technology that will improve our lives. In "Making Stuff: Colder," David Pogue explores the frontiers of cold science from saving the lives of severe trauma patients to ultracold physic

The world has always been a dangerous place, so how do we increase our odds of survival? In "Making Stuff: Safer," David Pogue explores the cutting-edge research of scientists and engineers who want to keep us out of harm’s way. Some are countering the threat of natural disasters with new firefighting materials and safer buildings. Others are at work on technologies to thwart terrorist attacks.

Gross Science: These flesh-eating plants usually prey on unsuspecting insects. But one species of ant calls this plant home. Watch the drama unfold...through watercolor animation! For media credits, visit: pbs.org/nova/nature/plants-killer-ants.html

Could tiny drones be the pollinators of the future? Credits Animated and Narrated by Anna Rothschild Cinematography by Steve McCarthy Original Footage ©WGBH Educational Foundation 2013 Additional Footage Courtesy Harvard's Wyss Institute for Biologically Inspired Engineering SLOW MOTION: Flying Hoverfly ©iStockphoto/Schroptschop

Engineers race to complete 1 World Trade Center as they grapple with the final challenges.