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We take on your science questions: Can animals feel guilty? Could drones detect landmines? What's the furthest a paper plane could fly, and why don't spiders get stuck on their webs? Plus, a look at this week's science news - a development for Europe's Extra Large telescope, and the health challenges faced at the Rugby World Cup.

This week we find out what it takes to save a life, from doctors performing open chest surgery in the street to helping people recover in the longer term from severe brain injuries. Plus, news of a real invisibility cloak, how caffeine gives us a boost, and why scientists need you to quiz your dog.

Climate change - and concerns about rising levels of carbon dioxide in the atmosphere - are often in the headlines. However, looking back in the history of the earth, it's clear that this isn't the first time carbon dioxide levels have risen. So why should we worry now? We delve into the past to explore the effects climate change can have on the oceans and how that, in turn, can impact the climate. Plus, in the news, a new species of early human ancestor, the scientist who's jumping the Hubble queue with a helium balloon, and why humans are hard-wired for laziness...

This week we're asking whether scientists and technologists are in short supply, and how the way that we teach science in schools is changing: some classrooms are pumping out published papers! Plus, in the news, a 2 metre-long scorpion, seabirds with stomachs stuffed with plastic, and the facts behind fat - is butter really all that bad for you?

This week is a very special, edition of the Naked Scientists as we dedicate a whole hour to the world's favourite dwarf planet - Pluto. But how did it get there in the first place? What has the New Horizons probe uncovered? And what's beyond Pluto? Graihagh Jackson puts the mission under the microscope, talking some of the leading scientists from the New Horizons operation and taking a trip to the edge of our solar system...

On the face of it, symmetry may seem simple, but diving beneath the surface reveals a whole new world. Over the last 100 years, the mathematical idea of symmetry has proved to be a guiding light for the world of physics. But what does a mathematician mean by symmetry? How does this link in with the world around us? And could it be the key to the mysterious 'Theory of Everything'? Plus, in the news, a new MRI-based cancer treatment, zero-emission highways and the curious case of Whistled Turkish.

We delve into the disgusting to discover the emotion of disgust and how it affects our lives. From cockroaches dipped in juice to the importance of sanitation, no topic is off limits as we find out about the psychology of this most powerful of emotions and its applications. Plus, in the news, a universal flu therapy, why zebras have stripes, and the robot that can jump on water.

Hundreds of times stronger than steel, transparent, an excellent electrical conductor, and weighing next to nothing, graphene is hailed as a wonder material. But what is it doing for us now? And where will it take us in future? This week graphene goes under the microscope. We hear how industry can mass produce it, we uncover how it can clean up air in cities, produce the world's fastest lasers, revolutionise communications and boost the power of computers. Plus, news of how Earth's earliest life reproduced, how to regenerate human organs, and why animals have different shaped pupils...

Hormones are the driving force behind reproduction and are what make us keen to go make babies. We follow some of these hormones to hear how they have an influence from birth to death, and also the unexpected consequences they have on society, including causing the stock market to crash. Plus what Philae has revealed about the comet it landed on, how the bugs in your guts might be making you moody, and the key to keeping hamsters happy...

From why scientists so often use the word "so" to the feasibility of charging a human by USB, how much Silly Putty it would it take to cover the entire Earth, and whether we could genetic engineer super-abilities into humans, we answer your burning science questions...