David Warner 
What Is the ‘Photon Sphere’ Around a Black Hole?
When we think about black holes, the first thing that often comes to mind is...
Is There an Ocean Inside Europa?
In the cold, dark, outer reaches of our solar system, orbiting the giant planet Jupiter,...
What Did Ancient Mars Really Look Like?
When we look at Mars today, we see a cold, dry, and dusty red desert....
Do ‘Micro’ Black Holes Exist?
The terms micro black hole and primordial black hole (PBH) are often used in similar...
Did Venus Ever Have Oceans?
When we look at our solar system, Earth stands out as a beautiful blue marble,...
The ‘Black Hole Information Paradox’ Is Stephen Hawking’s Theory Wrong?
Black holes are famous for being the universe’s ultimate traps. They are points in space...
Why Is Mercury’s Core So Huge?
When we look at our solar system, we see a family of planets, each with...
The ‘Dark Matter’ Problem: Are Black Holes the Answer?
The first solid clues for Dark Matter came from studying how galaxies rotate. Imagine a...