Hard as it is to imagine, there's a move afoot in Congress to take away the public's free online access to tax-funded medical research findings. That would be bad for medical discovery, bad for patients looking for the latest research results, and another rip-off of the American taxpayer.

PubMed Central is vital for researchers and the public alike. Only through free access can everyone find out where the cutting edge of research lies. With access to the latest studies, patients and their families have a much-needed piece of the puzzle as they consider treatment options and potential outcomes.

One always has to worry when capitalism has a role in health care. If you're just using health care to make money, you will treat the wrong diseases. Capitalism has its limits. There is a role for governments, and this is one where they should be involved.

During normal cell metabolism, RNA is constantly being made and broken down. The purine and pyrimidine residues are reused by several salvage pathways to make more genetic material. Purine is salvaged in the form of the corresponding nucleotide, whereas pyrimidine is salvaged as the nucleoside.

As an astrophysicist, my research work involves mapping dark matter, the elusive substance that accounts for about a quarter of our universe.

Mathematical science shows what is. It is the language of unseen relations between things. But to use and apply that language, we must be able fully to appreciate, to feel, to seize the unseen, the unconscious.

Teaching is like flying a plane. You leave school one day feeling like you're spiraling down toward the trees, expecting that the next day the crash will come. You brace yourself for the impact, only to find that things have leveled out at treetop height, and you climb and enjoy the remainder of the flight.

I went whole hog at the actor's lifestyle - really embraced it. I had by then known how much I loved acting already, because I discovered acting from a teacher in the seminary - that's the first place I ever did it, in the seminary.