Tom Harnischmacher

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The Greatest Cosmic Puzzle: Astronomers Find Stars That Appear Older Than The Universe

If you understand how stars work, you can observe the physical properties of one of them and extrapolate its age, and know when it had to have been born. Stars undergo a lot of changes as they age: their radius, luminosity, and temperature all evolve as they burn through their fuel. But a star’s …

SpaceX successfully launches mysterious X-37B spaceplane and recovers first stage

SpaceX can add another first to its ever-increasing list: On Thursday, it successfully launched the U.S. Air Force’s X-37B experimental spaceplane for the first time. This makes it the only launch provider to accomplish this besides the United Launch Alliance, and should help ensure SpaceX gets …

Space Travel

Yes, humans are still evolving. Here's how you can tell.

Even more evidence that we’re continuing to change.<p>The nice thing about bacteria is that they multiply really fast. This is inconvenient if they happen to infect, but useful if you want to see how evolution works. Put antibiotics on a Petri dish with enough bacteria, and a few days later you’ll …

Biology

All Extremely Confident People Give Up These 13 Habits

Real confidence is built through hard work and excellent habits.<p>Real confidence is not narcissism.<p>Although the two often get confused, people with narcissistic tendencies need everyone to think that they're special. They have a need for admiration and a sense of entitlement that's rooted in …

Self-help