Patrick's Cathedral on Fifth Avenue and visit the World Trade Center ground zero ahead of celebrating Mass at Yankee Stadium.

CNN: At synagogue, pope seeks 'bridges of friendship'

Particles with rest mass greater than zero mean time travel is possible.

FORBES: Faster Than Light Neutrinos: Not So Fast

Nissan said the Leaf hatchback would be the world's first affordable, mass-produced, zero-emission car.

BBC: Nissan Leaf electric car to be built in Sunderland

Assuming an average flow rate of about 1.5 million homes per year, you can eyeball the stock deficit by comparing the mass above and below the zero on the following graph.

FORBES: Are There Too Many Homes in America, Ctd

To compare alien planets, Dr. Mendez at the Planetary Habitability Laboratory and his colleagues are creating an Earth Similarity Index that ranks worlds by their resemblance to our own planet, on a scale from zero to one, based on their mass, radius, density and surface temperature.

WSJ: Login/Register to set your edition

Like all sales-driven organizations, Paramount needs to zero in quickly on the right executives, so forget about mass mailings.

FORBES: Wooing the customer

It would have involved manipulating mass psychology to calm a hysterical economy at a very low price, namely zero.

FORBES: Paul Krugman's Macroeconomic Rants

For zero nukes would make no sense if this left the world safe for the sorts of mass conventional warfare that consumed the first half of the 20th century.

ECONOMIST: Getting to zero