Call for a framework for reporting evidence for life beyond Earth.

  title={Call for a framework for reporting evidence for life beyond Earth.},
  author={James Green and Tori M. Hoehler and Marc Neveu and Shawn D. Domagal‐Goldman and Daniella Scalice and Mary A. Voytek},
  volume={598 7882},
Our generation could realistically be the one to discover evidence of life beyond Earth. With this privileged potential comes responsibility. The magnitude of the question of whether we are alone in the Universe, and the public interest therein, opens the possibility that results may be taken to imply more than the observations support, or than the observers intend. As life-detection objectives become increasingly prominent in space sciences, it is essential to open a community dialogue about… 

Searching for Life, Mindful of Lyfe’s Possibilities

We are embarking on a new age of astrobiology, one in which numerous interplanetary missions and telescopes will be designed, built, and launched with the explicit goal of finding evidence for life

Community Report from the Biosignatures Standards of Evidence Workshop

The search for life beyond the Earth is the overarching goal of the NASA Astrobiology Program, and it underpins the science of missions that explore the environments of Solar System planets and

False positives and the challenge of testing the alien hypothesis

The origin of life and the detection of alien life have historically been treated as separate scientific research problems. However, they are not strictly independent. Here, we discuss the need for a

The Futility of Exoplanet Biosignatures

The ultimate goal of astrobiology is to determine the distribution and diversity of life in the universe. But as the word “biosignature” suggests, what will be detected is not life itself, but an

The Case for Technosignatures: Why They May Be Abundant, Long-lived, Highly Detectable, and Unambiguous

The intuition suggested by the Drake equation implies that technology should be less prevalent than biology in the galaxy. However, it has been appreciated for decades in the SETI community that

COSPAR Sample Safety Assessment Framework (SSAF).

The Committee on Space Research (COSPAR) Sample Safety Assessment Framework (SSAF) has been developed by a COSPAR appointed Working Group. The objective of the sample safety assessment would be to

Photobombing Earth 2.0: Diffraction-limit-related Contamination and Uncertainty in Habitable Planet Spectra

  • P. Saxena
  • Physics, Geology
    The Astrophysical Journal Letters
  • 2022
Observing habitable exoplanets that may resemble Earth is a key priority in astronomy that is dependent on not only detecting such worlds but also ascertaining that apparent signatures of

Planetary Mass Spectrometry for Agnostic Life Detection in the Solar System

For the past fifty years of space exploration, mass spectrometry has provided unique chemical and physical insights on the characteristics of other planetary bodies in the Solar System. A variety of

MEMS GC Column Performance for Analyzing Organics and Biological Molecules for Future Landed Planetary Missions

We present a novel, innovative approach to gas chromatography-mass spectrometry (GC-MS) based on micro-electro-mechanical systems (MEMS) columns that improve the current, state-of-the-art by

Hype, skin in the game, and the stability of cooperative science

We address a recently posed question: ‘Why Do So Many Astronomy (and Astrobiology) Discoveries Fail to Live Up to the Hype?’ We expand it to cover hype within science in general. Our answer relies



A Statistical Comparative Planetology Approach to the Hunt for Habitable Exoplanets and Life Beyond the Solar System

The search for habitable exoplanets and life beyond the solar system is one of the most compelling scientific opportunities of our time. Nevertheless, the high cost of building facilities that can

The Ladder of Life Detection

The history and features of the Ladder of Life Detection are described, a tool intended to guide the design of investigations to detect microbial life within the practical constraints of robotic space missions and a small but expandable set of decision rules determining whether the abiotic hypothesis is disproved.

Defining life.

Various definitions of life held in the astrobiology community are discussed by considering their connected "theories of life," including certain "list" definitions and a popular definition that holds that life is a "self-sustaining chemical system capable of Darwinian evolution".

Morphological biosignatures and the search for life on Mars.

The use of high-resolution imaging and spectroscopic instruments, in conjunction with an improved knowledge base of the attributes that demonstrate life, will maximize the ability to recognize and assess the biogenicity of extraterrestrial and ancient terrestrial life.

Exoplanet Biosignatures: Understanding Oxygen as a Biosignature in the Context of Its Environment

The coevolution of life with the early Earth's environment is examined to identify how the interplay of sources and sinks may have suppressed O2 release into the atmosphere for several billion years, producing a false negative for biologically generated O2.

The Extraterrestrial Life Debate, Antiquity to 1915: A Source Book

This book presents key documents from the pre-1915 history of the extraterrestrial life debate. Introductions and commentaries accompany each source document, some of which are published here for the

Exploring for a record of ancient Martian life.

The immediate task facing exopaleontology is to define a strategy to explore Mars for a fossil record during the decade-long exploration program that lies ahead. Consideration of the quality of

Life on other worlds : the 20th-century extraterrestrial life debate

List of illustrations List of tables Acknowledgements Introduction 1. From the physical world to the biological universe: Democritus to Lowell 2. Life in the solar system 3. Solar systems beyond 4.