Marcelo visited a fourth-grade class — and said the kids showed him the best in humanity. "I'll go back next year and the year after. Not to teach them — but to let them teach me."
March 15, 2016

From topics like how science may illuminate our search for meaning to the search for, and discovery of, gravitational waves, there is much to look forward to on the printed page.
March 7, 2016

Though accidents may happen, there is no stopping human exploration of space: We are bound to outer shores as we were once bound to shores on this planet.
February 23, 2016

The next time you hear a scientist say something like "The more we know about the universe, the less important we become," beg to differ: The reality is precisely the opposite.
February 16, 2016

Given that there are trillions of worlds in our galaxy alone, circling hundreds of billions of stars, it would be a true statistical fluke if Earth were the only harbor for life.
February 9, 2016

To start, we can't ever be sure that what we find is the oldest life on Earth. All we can do is to keep looking for possible biomarkers in the oldest rocks around.
February 2, 2016

While the late musician produced many hits, he was in love with the space race, as evidenced by songs like "Starman," "Life on Mars?" and "Space Oddity."
January 26, 2016

In Star Wars, "The Force" may represent a cosmic consciousness — an abstract picture of a deity — in which case we are told, even in the divine, good and evil must coexist.
January 19, 2016

The year 2015 was a busy one for science, with discoveries on many fronts. Marcelo offers thoughts on a few.
January 6, 2016

The climate treaty demands a profound paradigm shift in how civilization interacts with nature and resources — and builds hope that our deeds carry more weight than our words.
December 30, 2015

If we have the power to create a hypothetical universe in a game like No Man's Sky, we can unleash the human exploratory drive to go where no one has gone before.
December 22, 2015

Genetically-modified plants show promise as a way to deliver nutrients at low cost. Can opposition groups, scientists and businesses work together to safely implement GMO crops?
December 15, 2015

As Albert Einstein's Theory of General Relativity turns 100, the scientist would surely be pleased with the revolution he started, a source of wonder and inspiration for all.
December 8, 2015

The kind of research being conducted at CERN is a reminder of what we can accomplish, together, even amid the darkest of times.
December 1, 2015

Religious belief offers a sense of community with the unknown — with what transcends the confines of our humanity — as science aims to extend our reality.
November 17, 2015

The web provides amazing access, often free, to information for educational purposes, made possible by enabling people and technology. 
November 10, 2015

Improvements in technology don't necessarily lead to more leisure time for people, but they allow us more freedom to choose what we spend our time doing.
November 3, 2015

In October, Oprah Winfrey's network aired a documentary series titled Belief, looking at how people search for meaning. Marcelo spoke with David Shadrack Smith, creative director of the series.
October 30, 2015

In examining the universe's origins, maybe we need a way of depicting the laws of nature as emerging behaviors that unfold and take hold as time elapses.
October 27, 2015

Incompleteness is the lifeblood of science. We don't know where the massive neutrinos will lead us, but it's fair to expect that the road ahead will have quite a few surprises.
October 20, 2015