Marcelo Gleiser

There is a paradox with living as a human nowadays.

A 2014 article from the United Nations states that about 54 percent of the human population lives in urban areas (more by now), a proportion that is projected to increase to 66 percent by 2050. By 2045, the report says, more than six billion people will crowd cities.

Two years ago yesterday, Dec. 12, nearly 200 countries came to a consensus that greenhouse emissions — mostly caused by the burning of fossil fuels — had to be drastically cut if we were to halt the planetary-changing consequences of a choking atmosphere.

The Sign, a documentary directed, shot and produced by Josh Turnbow and Robert Dvoran and set to air Thursday, addresses whether the end of days is coming this month, as some biblical literalists predict.

The "sign" in the title refers to an alignment in the sky peaking on Sept. 23, whereby Mercury, Venus, Mars, and Jupiter will be around the constellations of Virgo and Leo, together with the sun and moon. Sept. 23 is when Jupiter leaves Virgo after being there for a while.

America seems to be a magnet for devastating hurricanes these days.

This year, Harvey came out strong with its horrific toll on parts of Texas and Louisiana. Now Irma, downgraded slightly Friday morning to a Category 4 storm from its most recent days as a Category 5, has left destruction in its wake as it plows through the Caribbean and Cuba — and is on path to hit Florida Sunday morning.

This has been quite a space week for Americans.

After Monday's stunning solar eclipse, Wednesday night PBS will air its two-hour documentary film about the two Voyager missions, launched 40 years ago. The Farthest: Voyager In Space, celebrates a technological and intellectual achievement rarely matched in history. Two small, nuclear-powered spacecraft have traveled farther than any other man-made machine and have forever changed our views of the solar system — and our place in it.

There is comfort in distance, especially when the distance is in time.

Things that will happen far in the future seem not to bother us much, given that we will, most likely, be out of the picture.

"I believe the intellectual life of the whole of Western society is increasingly being split into two polar groups ..."

So wrote the British physicist and novelist C. P. Snow in his famous "The Two Cultures" Rede Lecture delivered at Cambridge University in 1959.

It finally happened. On Tuesday, the space probe New Horizons passed by a mere 7,800 miles from Pluto, the closest encounter ever with a world that is, on average, 3.7 billion miles from Earth.

It took nine years for the very fast probe to get there, something that our 13.7 blogger Adam Frank estimated would take some 6,923 years by car "give or take a few decades."

Since the Jan. 16 release of findings by NASA's Goddard Institute for Space Studies (GISS) indicating that 2014 has been the hottest year on record, naysayers have criticized the report as being exaggerated and distorted.