95% Invisible: Wrestling with Dark Matter and Dark Energy

We build things. We tinker. We break stuff. And sometimes, that stuff is our understanding of the universe. How much do you *really* know about what’s out there? It’s a sobering thought, but the universe we experience – the stars, planets, even *you* – only accounts for about 4.9% of its total matter and energy. Seriously. Chew on that for a minute. The rest? We’re talking 26.8% Dark Matter and a whopping 68.3% Dark Energy.

It’s easy to feel overwhelmed by those numbers. How can something exist that we can’t see, can’t detect directly, and barely understand? But for Rogue Scientists, that's not a roadblock—it's a challenge! It's the ultimate build project: figuring out what makes up the vast majority of the cosmos.

Dianna Cowern (Physics Girl) recently tackled this very topic in a visit to CERN, and she brought back some seriously interesting insights. The video below gives a fantastic overview of the problem and explores the ongoing search for answers.

The LHC (Large Hadron Collider) plays a key role, even if indirectly. Theoretical physicists at CERN are using the LHC to probe beyond the Standard Model of particle physics—searching for new particles that could potentially explain dark matter. The challenge, as Dorota Grabowska points out, is that we have *very little* understanding of dark matter’s mass. Is it tiny, like a neutrino? Or colossal, rivaling the mass of the entire visible universe? It’s a wild range, and figuring out which end of the spectrum is correct is the crux of the matter (pun intended!).

Why Should *You* Care?

This isn’t just about abstract physics. Understanding dark matter and dark energy has profound implications for our understanding of the universe’s past, present, and future. It affects our models of cosmology, galaxy formation, and the ultimate fate of the cosmos. Plus, the methods scientists are using to investigate these mysteries – advanced particle detectors, sophisticated simulations, and innovative experimental designs – are fertile ground for Rogue Scientists to explore.

Project Ideas for the Curious Mind

• Build a Scale Model of the Universe: Visually represent the proportions of normal matter, dark matter, and dark energy. This helps internalize just how small our contribution is.
• Simulate Galaxy Rotation Curves: Explore how the presence of dark matter explains the observed rotation of galaxies. This is a classic physics demonstration that can be adapted for different skill levels.
• Investigate Gravitational Lensing: Learn about how dark matter bends light, and try to simulate this phenomenon with lenses and light sources.
• Research Current Dark Matter Detection Experiments: Look into the various experiments (like XENON, LUX-ZEPLIN) and consider how they work. Could you design your own simplified detector?

This is a deep dive, yes, but the beauty of the Rogue Scientist ethos is that you don’t need to *know* everything to start exploring. Start with the video, build something, ask questions, and don’t be afraid to fail. That's where the real learning happens.