For me, Barack Obama's election was a milestone of the most extraordinary kind. On the day he was elected I felt such hope in my heart. I thought we were seeing the beginning of a new era of equal opportunity across race and gender such as America had never known before.

We must all learn a good lesson - how to live together. That is the new challenge of the new world... learning to co-exist and not co-annihilate.

Look at the coded language the Right is using against President Barack Obama. Openly calling him a liar in Congress, saying he is 'not a Christian, he was not born here, he is not one of us.' That makes addressing such issues trickier for the first African-American in the White House.

Leadership cannot just go along to get along. Leadership must meet the moral challenge of the day.

There are environmental threats to health; there are internal threats to health - genetic conditions, viral threats, diseases like cancer and Parkinson's. And then there are societal and global ones, like poverty and lack of nutrition. And unknown viral threats - everything from a new kind of influenza to hemorrhagic fever.

The conservative statement is that telomere length is a biomarker, but it's probably not passive. There are some very intimate relationships between things such as molecular markers for inflammation and telomere health.

In America, you keep on hearing productivity is low; secular stagnation, it's a new normal. It's just not true: We've had multiple wars; we're not educating our kids. We had government shut downs, badly-spent money, failures in the health system, failures and an extreme amount of regulation - that's why we're going slow.

As long as the reason of man continues fallible, and he is at liberty to exercise it, different opinions will be formed.