![](https://webarchive.library.unt.edu/eot2008/20090830102950im_/http://astrobiology.nasa.gov/img/_placehold/placehold-ask.jpg)
![Ask an Astrobiologist](https://webarchive.library.unt.edu/eot2008/20090830102950im_/http://astrobiology.nasa.gov/img/text/ask-an-astrobiologist.gif)
"Is there any astrological thing that will happen in 16 June 2013, or any information of a disaster that will take place at that time? "
Special Note
Ask an Astrobiologist has received nearly a thousand questions about Nibiru and 2012, with more than 200 answers posted. Please read a summary of the answers that have already been posted, use the search feature and read the FAQ’s before submitting questions on these topics.
-
Question
How would you go about finding out, when Mars lost it's Warm, wet environment, with a substantial atmosphere?
The general approach is to locate evidence for liquid water and determine its geological context. Thus, for example, the “valley networks” that are generally interpreted as evidence of rainfall (with an implied larger and warmer atmosphere) are associated with the ancient cratered highlands and are classed as Noachian in age, meaning generally older than 3.5 billion years. The huge outflow channels, which may indicate episodic presence of water on the surface, are Hesperian in age (roughly 2 to 3 billion years), as are the major volcanoes and the Tharsis Bulge. The most recent period is Amazonian, and this seems to have been a time when Mars was cold and dry, as it is today. Similar analysis is possible with the evidence for liquid water found on the ground by the current Mars rovers. Perhaps the greatest uncertainty is assigning absolute ages to these geological periods. We infer ages from the numbers of impact craters, but we have no Mars samples that can be used to give us precise ages in years, as we do for Earth and Moon. David Morrison
NAI Senior Scientist
December 26, 2007
![FAQ](https://webarchive.library.unt.edu/eot2008/20090830102950im_/http://astrobiology.nasa.gov/img/text/hd_faq.gif)
- How frequently are questions answered?
- I asked a question but there was no answer?
- Who is the Astrobiologist answering these questions?
- Will I get an email when my question is answered?
- What college courses should I take to become an astrobiologist?
- How can I get a job as an astrobiologist at NASA?
- Have aliens visited Earth? Are UFOs real?
- Is there a planet or brown dwarf called Nibiru or Eris that is approaching the Earth and threatening our planet with widespread destruction?
- Is it true that the Sun will be in the center of the Milky Way Galaxy in December 2012 and that this will cause a pole shift and massive destruction.
- Has NASA discovered life on other worlds?
- Astrobiology Career Path Suggestions