Browsing Tag
pbs space time
34 posts
Did Cosmic Rays Decide the Shape of Your DNA?
The very twist of your DNA might be a direct consequence of a fundamental asymmetry in the universe, delivered to the primordial Earth by high-energy cosmic rays.
Is the Universe a Fluke? The Problem of Fine-Tuning
Modern physics grapples with why the universe's fundamental constants appear "fine-tuned" for existence, suggesting either a radical new theory or the reality of a multiverse.
What If Reality Isn’t Built from the Bottom Up?
A mysterious 17-order-of-magnitude gap at the foundation of reality challenges our most fundamental scientific principle: that big things are simply the sum of their smaller parts.
What If Dark Energy Is Changing? The Universe May Be Telling Us So
New data from DESI hints that dark energy may weaken over time, challenging the long-held assumption that it is constant across the universe.
Why Complex Life May Be a Cosmic Fluke
Complex life may be vanishingly rare because eukaryotic cells—life’s energy-rich foundation—emerged only once in Earth’s history.
Why Matter Exists: LHC Uncovers New Clue in the Antimatter Mystery
A breakthrough at the Large Hadron Collider reveals that matter and antimatter baryons decay differently, offering a vital clue to why the universe exists.
Did the Earth Once Have Rings?
New research suggests Earth may have briefly had a ring system 466 million years ago—possibly triggering an ancient ice age and one of the planet’s biggest extinctions.
Is the Universe Infinite? Exploring the Cyclic Universe Theory
Some theories suggest the universe may not have begun with a singular Big Bang—but could instead be part of an endless cycle of cosmic rebirths.
How Do We Know If an Asteroid Will Hit Earth?
Astronomers track faint moving objects across the sky and use orbital math—refined since Kepler and Gauss—to determine whether…
The (Possible) Cosmic Origins of DNA
The theory of pseudo-panspermia suggests that the essential building blocks of life, such as amino acids and nucleobases,…