Earth's oldest fossils boost hopes for life on Mars

(PhysOrg.com) -- Microfossils found in Australia show that more than 3.4 billion years ago, bacteria thrived on an Earth that had no oxygen, a finding that boosts hopes life has existed on Mars, a study published Sunday says.

How the seeds of planets take shape

In theoretical research that could explain everything from planet formation to outflows from stars, to even the settling of volcanic ash, Caltech researchers have discovered a new mechanism to explain how the act of dust ...

Manure used by Europe's first farmers 8,000 years ago

(Phys.org) —A new study says Europe's first farmers used far more sophisticated practices than was previously thought. A research team led by the University of Oxford has found that Neolithic farmers manured and watered ...

Frozen comet had a watery past, scientists find

For the first time, scientists have found convincing evidence for the presence of liquid water in a comet, shattering the current paradigm that comets never get warm enough to melt the ice that makes up the bulk of their ...

Earth's mantle plasticity explained

Earth's mantle is a solid layer that undergoes slow, continuous convective motion. But how do these rocks deform, thus making such motion possible, given that minerals such as olivine (the main constituent of the upper mantle) ...

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