Biofilms are a widely observed growth mode in which microbial communities are spatially
structured and embedded in a polymeric extracellular matrix. Here, we focus on the model …

Abstract The Archean era (4 to 2.5 billion years ago, Ga) yielded rocks that include the
oldest conclusive traces of life as well as many controversial occurrences. Carbonaceous …

It is often acknowledged that the search for life on Mars might produce false positive results,
particularly via the detection of objects, patterns or substances that resemble the products of …

The recognition of past habitable environments on Mars has increased the urgency to
understand biosignature preservation in and characterize analogues of these environments …

For decades, deep sea hydrothermal vents have been a preferred setting for the Origin of
Life, but “The Water Problem” as relates to polymerization of organic molecules, together …

We present a case for the exploration of Venus as an astrobiology target—(1) investigations
focused on the likelihood that liquid water existed on the surface in the past, leading to the …

It is widely hypothesised that primeval life utilised small organic molecules as sources of
carbon and energy. However, the presence of such primordial ingredients in early Earth …

The history of molecular oxygen (O2) in Earth's atmosphere is still debated; however,
geological evidence supports at least two major episodes where O2 increased by an order …

Recent discoveries of geyserite and siliceous sinter with textural biosignatures in the∼ 3.5
Ga Dresser Formation of the Pilbara Craton, Western Australia, extended the record of …

The emerging field of astropedology is the study of ancient soils on Earth and other
planetary bodies. Examination of the complex factors that control the preservation of organic …