How to find aliens | Lee Cronin and Lex Fridman

TL;DR

Using high-resolution mass spectrometers and assembly index, scientists can potentially discover evidence of alien life on Mars or other planets.

Transcript

if I show up to new planet we go to Mars or some other planet from a different solar system and how do we use assembly index there to discover alien life um in very simply actually if we let's say we'll go to Mars with a mass spectrometer with a sufficiently high resolution so what you have to be able to do so good thing about Mass Spec um is that ... Read More

Key Insights

• ✋ Mass spectrometry with high resolution can be used to identify artifacts produced by life on Earth on other planets.
• 🫰 The assembly index, determined by molecular weight and number of fragments of a molecule, can indicate the presence of life on other planets.
• ©️ The number of copies of molecules is important because it implies structure and complexity.
• 🛟 A life meter combining infrared spectroscopy and mass spectrometry can be used to search for evidence of life on other planets.
• 👽 Looking for complexity without Earth bias is crucial to identifying alien life forms.
• ❓ Random complexity and the complexity found in living systems can be distinguished through the concept of identical molecules.
• 🖐️ Detection systems and resolution play a role in determining what is considered identical.

Questions & Answers

Q: How can mass spectrometers and assembly index be used to discover alien life?

Mass spectrometers with high resolution can analyze molecules on other planets. By looking for molecules with a high molecular weight and many fragments, scientists can identify artifacts produced by life on Earth, potentially indicating the presence of alien life.

Q: What is the significance of the number of copies of molecules in assembly theory?

The number of copies implies structure and complexity. Identical molecules have identical bonding and composition, allowing them to be distinguished from random complexity. The detection system and resolution determine what is considered identical.

Q: How can a life meter be used to search for evidence of life on other planets?

A life meter could incorporate both infrared and mass spectrometry to analyze samples. By adding a solvent or gas to a sample, separating its components, and then analyzing them using mass spectrometry and infrared spectroscopy, complexity and abundance can be measured to indicate the presence of life.

Q: Why is looking for complexity without Earth chemistry or biology bias important?

By focusing on small biomarkers or Earth-specific molecules, scientists may overlook other forms of life. Assembly theory allows for the detection of complexity that is not influenced by Earth's biology or chemistry, providing a more unbiased approach to discovering alien life.

Summary & Key Takeaways

• Assembly theory suggests that the assembly index, which is determined by the molecular weight and number of fragments of a molecule, can be used to identify artifacts produced by life on Earth.

• By using mass spectrometers with high resolution on other planets like Mars, scientists can look for molecules with greater than 350 molecular weight and more than 15 fragments, which would indicate the presence of life.

• The number of copies, or identical molecules, is important because it implies structure and complexity, distinguishing random complexity from the complexity seen in living systems.