Nature.com

Sore shoulder and signs of leg fatigue force Opportunity out of martian crater.

Caution needed in clinical trials, scientists urge.

Proof-of-concept system could lead to ultra-secure international communication.

But those with siblings are more selfish than those without.

Viral action identified as key component in carbon cycle.

If more than 90% of the genome is 'junk' then why do cells make so much RNA from it? Anna Petherick goes in search of some answers.

Cancer cells vary; they compete; the fittest survive. Patrick Goymer reports on how evolutionary biology can be applied to cancer #20; and what good it might do.

Rail travel produces more than a third less emissions than road transport #20; even though trains carry 7% of traffic, they emit just 0.2% of the carbon monoxide, 2% of nitrogen oxides and 1% of the volatile organic compounds. Although electric passenger trains are relatively green, most of the world's trains are used for haulage and run on diesel. In the latest of our Future Transport series, Duncan Graham-Rowe sees trains switching to a greener track.

GLAST provides first sky map #19; and gets a new name.

Conflict with Russia puts reforms in jeopardy.

The potential of 'object therapy' to be tested in hospital.

Artificial system shows how a molecular soup could be exploited by a single self-replicating complex.

Counter-clockwise beam test produces historic particle collisions.

B-field bovines apparently sense Earth's magnetic field.