Firstly, “development”, as mentioned in the firstsentence, is a ridiculously vague term. TheHDI, however, has made it abundantly clearthat human development is measured usingthree criteria: education (length of time spentat school), health (life expectancy) and “livingstandards” (gross domestic product per capita).Yet human development, however difficult itmay be to define, clearly extends further thanthese three aspects. In fact, all three of thesecriteria are largely influenced by the state ofthe country’s economy, the relationship thatHDI apparently strived, and failed, to minimise.Peoples’ access to clean water, for example, isnot included, yet can vary massively dependenton geographical location and climate whateverthe state of a country’s economy.By considering only the amount of time peoplespend in school for the education criteria of theHDI, there are already massive problems. Whileadult literacy is an important component of humandevelopment, levels of literacy cannot becompared between languages varying in difficultyas much as English and Japanese. It isalso important to consider that it is not somuch the length of one’s education, but morethe quality of that education that matters more;a classroom with blackboard and chalk is incomparableto a classroom with Smart Boardand electricity. In 2010, the percentage ofschool enrolment in Malawi was 64%, yet only22% were literate at the age of ten.Each of the three criteria contributes evenly tothe overall the HDI figure. This makes the HDIan unreliable measure of human developmentas different societies prioritise different HDIcomponents over others. Moreover, the correlationsbetween each of the criteria and the HDIare unequal. Bryan Caplan, an American economist,believes this is the ultimate flaw in theHDI:“A country of immortals with infinite percapita GDP would get a score of 0.666(lower than South Africa and Tajikistan) ifits population were illiterate and neverwent to school.”The existence of vast inequalities in human developmentwithin certain nations must be takeninto account; yet the HDI sticks to taking meanaverages for the statistics it uses. Saudi Arabia,for example, has the largest oil reserves in theArabian Peninsula, and as such has one of theregion’s largest economies, yet some are stilldeprived of basic human rights in certain regions.Yet the biggest flaw which, I personally, findwith the HDI is the fact that this measurementof human development is based only on materialdevelopment, on either a deficiency or a surplusof tangible objects. Ratan Lal Basu, an Indianeconomist, believes that human developmentshould also be based on moral and psychologicaldevelopment. This argument is anextremely logical and profound reprieve fromother more technical criticisms of the HDI. It iswhy humans act in certain ways that ultimatelyinfluence their material outcomes the most.Haiti for example is a country firmly stuck inthe category of “Low Human Development”, yetstill manages to maintain one of the lowest suiciderates in the world. Inequality in the worldis inevitable; the only thing we can change ishow well we cope with it and attempt to rectifyit.14
A milky Milky Way by Simon Fox 11R1, Deputy EditorEveryday we see pictures of the Milky Wayfrom the Earth’s perspective in shades of blue,purple, pink andwhite, but thesepictures can becomecoloured so itis visible to the humaneye. So whatis the actual colourof our home galaxy?Firstly, there are two reasons as to why thesestriking images can become distorted for ourpurposes. As we are part of the Milky Way itself,we only get a view looking side-on andthis results in much light getting blocked by extremelydense dust particles, either in the formof clouds or diffuse dust. We can only seeroughly one or two thousand light years in alldirections because the Earth is rooted in one ofthe galaxy’s spiral arms. The second factorcomes down to the astrophotographers. Specialfilters are used to capture various wavelengthsof light which cannot be detected by the nakedeye and these wavelengths are subsequentlyaltered into recognisable shades.Our ancestors used the term “Milky Way” becausewhen they looked up into the night’s skyand saw the expanse of stars stretching acrossthe horizon, it comes out white to our foolishhuman eyes. Without the use of the telescope,the arc of our home galaxy appears to glow avery bright white at night. However this is onlythe case due to the lack of perception and sensitivityof our eyes, not being able to comprehendhues in low-light levels. Therefore, if asatellite could travel a few light years awayfrom the Milky Way and take a picture, whatcolour would we observe from this outsideviewpoint?Recently, astronomers have found out that ourgalaxy has the right names but for the wrongreasons. It turns out the Milky Way really ismilky, or more specifically the colour of finegrain snow, according to new research. Whenlooking at other galaxies, the entirety of themcan be seen, and they can be examined for colourand luminosity. Colour and brightness havebeen great tools for astronomy, helping us tounderstand stars and galaxies. The Milky Waycould then be compared to other galaxies whichare known to be similar, in terms of the rate oftheir star formation and the number of starspresent. These two particular factors do affectthe colour and luminosity of a galaxy, becauseas the age of a star varies so too does the colour,and a pattern can be identified: the youngerstars tend to be blue, while the older onesappear redder in colour.The shade of a sun can tell us how much energythat sun is using and how hot it is as well.Blue stars, therefore the young ones, burn atmuch higher temperatures and they have alarger mass. They do not last as long as smallerstars and this is indicated by their surface temperatureand alsothe fact that theirpower output is farhigher, using theirresources muchfaster than starslike our very ownSun. Blue stars tend to only appear in areas inareas of star formation, while they are absentwhere the star population is thought to bemuch older.In this new study, a large number of galaxieswere found with well known colour and similarstellar properties to that of the Milky Way. Aftersome comparison, the scientists came to theconclusion that our home is snowy white and isdirectly in between the bluer and redder galaxies(in terms of time, not physically). However,this does mean that our galaxy will not remainthe milky colour for much longer. All the bluehues have diminished and now the rate of starformation is waning, until the older, redderstars, which have used all of their fuels stores,will fizzle out and die. Finally, the huge outreachof the spiral arms of our Milky Way willfade and descend into anonymity as the lastblue stars vanish.If it’s any consolation, this will occur in billionsof years from now, so don’t fret just yet!15