The research aims to produce valid information and must use reliable instruments that guarantee accurate and make it quantifiable and possible reproducibility. Allowing the exclusion or at least control prejudice of personal insights and trends that may distort the results.
sábado, 11 de junio de 2011
The Mystery and Beauty of Noctilucent Clouds : Photos
Noctilucent Cloud This is the time of year to look out for stunning "night-shining clouds," but their origins still baffle scientists.