TED: How we found hundreds of Earth-like planets

Astronomer Dimitar Sasselov and his colleagues search for Earth-like planets that may, someday, help us answer centuries-old questions about the origin and existence of biological life elsewhere (and on Earth). How many such planets have they found already? Several hundreds.

About Dimitar Sasselov
Dimitar Sasselov works on uniting the physical and life sciences in the hunt for answers to the question of how life began

School Board might OK teaching creationism

LIVINGSTON — The Livingston Parish School Board will begin exploring the possibility of incorporating the teaching of “creationism” in the public school system’s science classes.

During the board’s meeting Thursday, several board members expressed an interest in the teaching of creationism, an alternative to the study of the theory of evolution, in Livingston Parish public school classrooms.

The discussion came up during a report on the pupil progression plan for the 2010-11 school year, delivered by Jan Benton, director of curriculum.

Benton said that under provisions of the Science Education Act enacted last year by the Louisiana Legislature, schools can present what she termed “critical thinking and creationism” in science classes.

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Growing Body Parts

Thousands wait in vain for organ transplants; soldiers return from battle horribly maimed. There is only so much medicine can do, but we may be on the path to a new technology in which quite literally, we will be growing new body parts.

It's called "regenerative medicine," where cells in the human body are manipulated into regrowing tissue.

As we first reported last December, researchers have so far created beating hearts, ears and bladders. Biotech companies and the Pentagon have invested hundreds of millions of dollars in research that could profoundly change millions of lives.

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Quantum time machine 'allows paradox-free time travel'

Quantum physicists at the Massachusetts Institute of Technology believe it is possible to create a time machine which could affect the past without creating a "grandfather paradox".

Scientists have for some years been able to 'teleport' quantum states from one place to another. Now Seth Lloyd and his MIT team say that, using the same principles and a further strange quantum effect known as 'postselection', it should be possible to do the same backwards in time. Lloyd told the Technology Review: "It is possible for particles (and, in principle, people) to tunnel from the future to the past."

Postselection is a vital part of the nascent science of quantum computing. In traditional computing, if a user needs to determine which set of variables in an equation leads to the answer being true, the computer must try every combination until it hits upon one that works. In quantum computing, due to the weird parallel behaviour of subatomic particles, it seems to be possible to simplify the procedure by running all possible variations simultaneously, and selecting only the combinations that make the answer true.

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