Science

A regional war in say, South Asia, which involved as few as one hundred nuclear bombs would result in firestorms in their urban centres that would put so much smoke and particulate into the atmosphere that the earth would be covered in a cloud that would reflect sunlight back into space and reduce global temperatures but two to three degrees for several years. This would kill most food crops on the planet, resulting in massive famines and starvation.

Nuclear weapons expert and president of the Ploughshares Fund.

Every plant has to endlessly sense and monitor a number of environmental parameters; and is constantly called upon to make decisions. This is not the place to list numerous cases of intelligence behaviour in plants, a huge volume of such examples can be found in scientific literature.

Plant neurobiologist and founder of the International Laboratory of Plant Neurobiology.

A nervous system is just a group of cells specialised in transmitting impulses from one to another. Ordinary plant cells can do this, albeit in a less efficient way. It is indisputable that there is no need of this "Holy Grail" of a nervous system to have the miracle of the transmission of electrical signals and communication.

Plant neurobiologist and founder of the International Laboratory of Plant Neurobiology.

In biology we are still in a kind of Ptolemaic era with man considering himself the centre of the universe.

Plant neurobiologist and founder of the International Laboratory of Plant Neurobiology.

Intelligence is the ability to solve problems. For me intelligence is a property of life. Even the most humble unicellular living organism must be intelligent to solve the problems of everyday life. Human intelligence is, for want of a better phrase, a degree of magnitude greater than the intelligence of a Paramecium or, better, of a Chlamydomonas; but the difference is just quantitative and not qualitative.

Plant neurobiologist and founder of the International Laboratory of Plant Neurobiology.

DNA is not life. A single chemical molecule has nothing to do with life. DNA is merely a storage system. Nobody would ever say that the "Divine Comedy" is the actual paper and ink on which one of its copies is printed, however many influential scientists have supported this nonsensical viewpoint.

Plant neurobiologist and founder of the International Laboratory of Plant Neurobiology.

I made the analogy of earthquake faults- when they get aligned, they either all move, or they don't move- we also have this diversity of micro fault-lines that fail, and I think that's a huge problem.

Hedge Fund Manager & Author of "The Black Swan" Risk Management

If you use a complex system approach which doesn't have a fixed period of time in the model, it enables you to start exploring what types of animals you will see! It's classifying the elephants in the room - it may not tell you which one will come, but it will give you a better idea of what is out there in terms of risk.

Physics professor studying complex systems, crowd behavior, and social networks.

The actual actions of the people in the market are the things that determine what happens next within the market. The 'standard' financial markets model is, effectively, based on a coin toss. That is how derivatives are priced and how every exotic financial instrument is seen- they are very fancy coins, where flipping creates price changes.

Physics professor studying complex systems, crowd behavior, and social networks.

In science, one never shows causality. Causality is something philosophers are concerned with, not scientists. I cannot stress this in strong enough words- we have not shown a causal link between the public's mood state as we measured it from twitter data feeds, and the market.

Unknown.

What's special about it as a science subject is that it is so awkward, it doesn't lend itself to easy solutions. It's a multi-factorial problem, very different to- for example- the question of what causes influenza?

Pioneering addiction medicine researcher and founder of addiction studies field

Once you land, it's total excitement, 'I'm on the Moon!' – you're bubbling with enthusiasm like a little kid on holiday. I thought the Moon was just awesomely beautiful. It was stark, barren, lifeless… yet it had this beauty like the desert.

Astronaut on Apollo 16 Moon Landing Mission

From 20,000 miles away however, you couldn't see any civilisation- just the land mass and those three colours… the brown of the land, the white of the clouds and the ice, and the crystal blue of the ocean. Earth was just suspended in the blackness of space and it was an incredibly beautiful sight.

Astronaut on Apollo 16 Moon Landing Mission

It's multi-fold. Firstly resources that are useful on Earth that we may get from outer space and secondly- which is perhaps a newer idea- is resources that will be useful in space itself. Water is the essence of life. In space it takes on a whole new form. We can use water as a radiation shield. Water is a molecule made of hydrogen and oxygen- and that happens to be rocket fuel.

putting all our knowledge together, the number of civilizations which could have arisen by now is about one billion.

Astronomer who created the Drake Equation for extraterrestrial life

even allowing for a margin of error of 5000%, there must be in our galaxy about 100 million stars which have planets of the right chemistry, dimensions, and temperature to support organic evolution.

Founder of Jodrell Bank Observatory & Radio Astronomer