Jim Bell

Este archivo solo abarca los artículos del autor incorporados a este sitio a partir del 1 de diciembre de 2006. Para fechas anteriores realice una búsqueda entrecomillando su nombre.

We Need to Start Traveling Again. Here’s How

Travel restrictions are disrupting international trade and holding back recovery from the trillions of dollars the pandemic has added to world debt. To stem the damage and open up the world safely, we need a global vaccine certification system — an undertaking that would require the political leadership that only the Group of 20 can provide.

Admirable attempts to reopen borders have been made, but these have often been piecemeal, unilateral and transitory. Frequent changes to entry protocols have left passengers confused, while mandatory quarantines and multiple tests are prohibitively expensive and impractical, and not necessarily science-driven. This is not a sustainable model, given that we will be living alongside Covid for some time.…  Seguir leyendo »

The amazing discoveries from NASA's Kepler planet-hunting space telescope keep rolling in. The latest, announced this week by astronomers, is the discovery of a planet just 10% larger than the Earth orbiting in the so-called "habitable zone" of the star Kepler-186.

In our solar system, Earth is the only planet in the habitable zone -- the distance from the sun where liquid water can exist on the surface without boiling away (like on Venus), or turning to ice (like on Mars).

The new planet, imaginatively dubbed Kepler-186f for now, appears to be in the same kind of Goldilocks place in its solar system.…  Seguir leyendo »