Archive for the 'earth' Category

The origin of trees

The great  Richard Feynman was a nobelist, a philosopher and a great teacher. In this video he explains how trees are created from thin air!!



This is not intuitive but it is -of course- absolutely true, and a wonderful example of the difference between learning (that trees get their material from CO2) and understanding (*Air* is transformed in to a living tree). Also a testament of how, the beauty one can see in the cosmos, is enhanced with the better understanding of it….

Liquid water on the surface of Mars

It was earlier this month confirmed that liquid water was found on the surface of Mars. This mean that two things have just skyrocketed :

  1. The chances that we will find life on Mars.
  2. The chances our mars missions contaminate the planet.

The second one is what we should worry about: Life on Mars is or Life on Mars isn’t. Nothing we can do about it. But the notion that we can destroy it by mistake is really scary.

Just a matter of time.

Multi-planet-systemThe Kepler mission has been a great success up to now.  The Kepler space telescope was created to search for solar systems with multiple planets, and the results have been astonishing so far. According to Ian o’Neil’s article on :

“The number of known multi-planetary star systems has just tripled. What’s more, the Kepler space telescope science team has just announced that they have doubled the number of confirmed exoplanetary sightings made by the observatory.”

“Prior to the Kepler mission, we knew of perhaps 500 exoplanets across the whole sky,” said Doug Hudgins, Kepler program scientist at NASA Headquarters in Washington, D.C. “Now, in just two years staring at a patch of sky not much bigger than your fist, Kepler has discovered more than 60 planets and more than 2,300 planet candidates. This tells us that our galaxy is positively loaded with planets of all sizes and orbits.”

It seems that it’s only a matter of time before we find the first habitable planet – like earth- in a nearby star system. This could very well be the greatest discovery of all times !