Numerous cellular changes underlie the decline of muscle mass and strength in the elderly.

Researchers untangle the multifarious nature of muscle aging. So far, the only reliable treatment is exercise.

Among 11 infants treated to date, most survived and their heart function improved.

The parasitic plant manages to go without a component of mitochondria found in all other multicellular life forms.

A transgenic approach allows researchers to collect the organelles from specific cells in nematodes with unprecedented efficiency.

Adding a fusion gene to certain mitochondria in C. elegans enables researchers to collect and analyze them.

Contrary to some hypotheses, the organelles did not descend from any known lineage of Alphaproteobacteria, researchers find.

Experiments in mice show that mitochondria, both within the tumor and beyond, can make the difference between promoting or inhibiting cancer spread.

Mitochondria may sustain temperatures more than 10 °C warmer than human cells, say researchers.