Space probe confirms chemicals of life in comet's halo

Scientists have found further evidence supporting the theory that some of the building blocks for life may have come to Earth from outer space.

Using instruments aboard the European space probe Rosetta, researchers detected glycine and phosphorus in the dusty halo around a comet.

Glycine is an amino acid, one of the molecules needed to make proteins, while phosphorus is essential for DNA and cells.

Their presence in the coma enveloping comet 67P/Churyumov-Gerasimenko "supports the idea that comets delivered key molecules for prebiotic chemistry throughout the solar system and, in particular, to the early Earth," according to the study published online Friday...