Iron sulfide mineral pyrite cystals provides evidence showing the presence of life on land 300 million years ealier than previously thought.
A new study from The Scripps Research Institute (TSRI) has offered a surprising twist of how life began on earth, questioning the likeability of the "RNA World" Hypothesis and proposing that DNA may have also existed when life began.
Carbon gave life to the planet, but the question is where did this carbon come from? Scientists from Rice University have a possible answer: a planetary collision 4.4 billion years ago.
Scientists have previously discovered that most of the molecular building blocks of life, organic compounds that can be assembled to protein, RNA and DNA, can be found in comets, interstellar dust and asteroid.