Western Sahara: Reasons for Extemporaneous Colonization and Decolonization realiza,en apenas 150 páginas de contenido, un meritorio repaso sobre la historia del territorioque actualmente conocemos como Sáhara Occidental, desde aparición las primerascomunidades tribales hasta que los españoles lo abandonaron, dejando a sus espaldas unauténtico avispero. Además, presta atención principales aporta...

Awareness and knowledge about HIV mother-to-child transmission (MTCT) and preventive measures in different population groups and health personnel were analysed in future intervention areas in western Uganda and southwestern Tanzania. In Uganda, a total of 751 persons (440 clients of antenatal and outpatient clinics, 43 health workers, 239 villagers, 29 traditional birth attendants) and in Tanza...

The Sahara experienced several humid episodes during the late Quaternary, associated with the development of vast fluvial networks and enhanced freshwater delivery to the surrounding ocean margins. In particular, marine sediment records off Western Sahara indicate deposition of river-borne material at those times, implying sustained fluvial discharges along the West African margin. Today, howev...

Kröpelin et al. (Research Articles, 9 May 2008, p. 765) interpreted a sediment record from Lake Yoa in the east-central part of North Africa as support for a weak biogeophysical climate-vegetation feedback in the Sahara during the mid-Holocene. We argue that the new data do not invalidate earlier modeling results on strong land-atmosphere coupling in the Western Sahara for which the Lake Yoa re...

There is a large body of research devoted to hunting lions in the Sahara Desert [2]. In none of these, however, is any concern given to feeding the lion once it is captured. In this note, we propose feeding Stan Wagon to the lion. Place an orange in the middle of the Sahara Desert. Cut it up into a finite number of pieces and rearrange the pieces to form the Sun. The gravity of the Sun will the...

Since the start of the Holocene, temperatures in the Arctic have steadily declined. This has been accredited to the orbitally forced decrease in summer insolation reconstructed over the same period. However, here we present climate modelling results from an Earth model of intermediate complexity (EMIC) that indicate that 17–40 % of the cooling in the Arctic, over the period 9–0 ka, was a direct...

BACKGROUND Pastoral social-ecological systems (SESs) are adaptive and complex systems rooted in the extensive exploitation of forage plants for livestock-based livelihoods and culture. There are species and relations that are foundational to the existence of these SESs. Nucularia perrinii Batt. (Chenopodiaceae) is an endemic halophyte plant of central and western Sahara seldom cited in the scie...

It is widely accepted that modern humans originated in sub-Saharan Africa approximately 150-200 thousand years ago (ka), but their route of dispersal across the currently hyperarid Sahara remains controversial. Given that the first modern humans north of the Sahara are found in the Levant approximately 120-90 ka, northward dispersal likely occurred during a humid episode in the Sahara within Ma...