The Migration of Anatomically Modern Humans

Evidence from fossils, ancient artefacts and genetic analyses combine to tell a compelling story.

Two routes jump out as prime candidates for the human exodus out of Africa. A northern route would have taken our ancestors from their base in eastern sub-Saharan Africa across the Sahara desert, then through Sinai and into the Levant. An alternative southern route may have charted a path from Djibouti or Eritrea in the Horn of Africa across the Bab el•Mandeb strait and into Yemen and around the Arabian peninsula. The plausibility of these two routes as gateways out of Africa has been studied as part of the UK's Natural Environment Research Council's 
programme 'Environmental Factors in the Chronology of Human Evolution 8 Disperser (EFCHED). 

During the last ice age, from about 80,000 to 11,000 years ago, sea levels dropped as the ice sheets grew, exposing large swathes of land now submerged under water and connecting regions now separated by the sea. By reconstructing ancient shorelines, the EFOIED team found that the Bab el-Mandeb strait, now around 30 kilometres wide and one of the world's busiest shipping lanes, was then a narrow, shallow channel. 

Early humans may have taken this southern route out of Africa. The northern route appears easier, especially given the team's finding that the Suez basin was dry during the last ice age. But crossing the Sahara desert is no small matter. EKHED scientist Simon Armitage of the Royal Holloway University of London has found some clues as to how this might have been possible. During the past 150,000 years, North Africa has experienced abrupt switches between dry, arid conditions and a humid climate. During the longer wetter periods huge lakes existed in both Chad and Libya, which would have provided a "humid corridor" across the Sahara. 
Armitage has discovered that these lakes were present around 10,000 years ago, when there is abundant evidence for human occupation of the Sahara, as well as around 115,000 years ago, when our ancestors first made forays into Israel. It is unknown whether another humid corridor appeared between about 65,000 and 50,000 years ago, the most likely time frame for the human exodus. Moreover, accumulating evidence is pointing to the southern route as the most likely jumping-off point.

7 Billion: How Did We Get So Big So Fast?

It was just over two centuries ago that the global population was 1 billion — in 1804. But better medicine and improved agriculture resulted in higher life expectancy for children, dramatically increasing the world population, especially in the West.

As higher standards of living and better health care are reaching more parts of the world, the rates of fertility — and population growth — have started to slow down, though the population will continue to grow for the foreseeable future.

U.N. forecasts suggest the world population could hit a peak of 10.1 billion by 2100 before beginning to decline. But exact numbers are hard to come by — just small variations in fertility rates could mean a population of 15 billion by the end of the century.

Produced by Adam Cole
Cinematography by Maggie Starbard

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World Party For 7 Billion People

There will soon be seven billion people on the planet. By 2045 global population is projected to reach nine billion. Nigel Holmes is a British graphic designer and theorist, imagines how much space we would need to host a world party for 7 billion people in 2011.

Can the planet take the strain?

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Three Dimensions of a Software Programmer: How to get things done

People are amazing, surprising and interesting. They change reality with power of thought and make things happen. What is most exciting – all people are completely different in their attitudes and behavior. But this comes with price – it is difficult to understand people and even more difficult to find the best way to deal with them. Many people, who see programmers as extensions of their computer systems, will be surprised to discover that programmers are amazing individuals too. Programmers exhibit similar to other people behavior, they have different personalities and need individual approach.

This article explains  a simple theory about Three Dimensions of a Software Programmer that could help to put relations with these individuals on some rational basis.