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How did Africa get its name?
These maps show surprising juxtapositions of ancient and modern toponyms of the Mother Continent.
- "Africa" is just one of the ancient names that competed to define the entire continent.
- Geographical terms like Sudan, Maghreb, and Guinea have remarkably wide and changeable areas of application.
- Newly independent African nations sometimes adopted names of former kingdoms – even faraway ones.
Vast and varied
The place-name pairs come in three categories: ancient, geographical and pre-colonial.
The names of continents are so well-established that we forget how obscure their origins really are. America is named after an Italian explorer, but not the one historically credited with its discovery. Europe and Asia may derive from the Akkadian words for "sunset" and "sunrise," but there are a host of other etymologies.
And, as these maps show, Africa is just one of the many names that have been used to describe this vast and varied land mass. The maps come in three categories – names of ancient, geographical and pre-colonial origin – and show the areas to which those names apply: dark, for the old version; and outlined, for the current one.
Libya, Ethiopia and Africa are all local names that at one time applied to the entire continent.
- Libya is an ancient Greek toponym for the lands between the Nile and the Atlantic Ocean, and sometimes by extension for the entire continent. The name may derive from the local Libu tribe. Libya is also the name of the modern North African country between Tunisia and Egypt, formerly infamous for the violent surrealism of Colonel Ghadaffi's decades-long dictatorship and currently for its lawlessness and low-intensity civil war.
- Ethiopia derives from the classical Greek for "burnt-face" (possibly in contrast to the lighter-skinned inhabitants of Libya). It first appears in Homer's Iliad and was used by the historian Herodotus to denote those areas of Africa south of the Sahara part of the "Ecumene" (i.e. the inhabitable world). But the Greek term originally applied to Nubia (a.k.a. Kush). Later, it was adopted by the kingdom of Axum, a distant precursor to present-day Ethiopia.
- In 148 BCE, the Romans established the province of Africa Proconsularis, which covered most of present-day Tunisia and adjoining coastal bits of Algeria and Libya. The etymology is uncertain: "Africa" might mean "sunny," "birthplace," "cave-dwelling," or "rainwind;" refer to the ancient Afri tribe, the biblical port of Ophir, a grandson of Abraham named Epher, or a Himyarite king named Afrikin. Over time, perhaps because of its solid Roman pedigree, "Africa" became (European) cartographers' preferred term for the entire continent.
Three African countries – and one in Oceania – carry the name Guinea.
- Bilad as-Sudaan is Arabic for "Land of Black People." Once referring to all of sub-Saharan Africa, the name latterly applied to the savannah belt running south of the Sahara from the Atlantic to the edge of the country that came in the British sphere of influence in 1899 as the Anglo-Egyptian Sudan. Following a successful referendum, South Sudan seceded from Sudan in 2011. The other country outlined here is Mali, which until independence was known as French Soudan.
- Guiné was the Portuguese geographical term for West Africa. Its zone of application covers two of the three African countries named after it: Guinea (the larger country in the west) and Equatorial Guinea (in the east). Guinea Bissau, the smaller neighbor of Guinea, falls just outside the ancient domain of Guiné. A fourth country, Papua New Guinea, just north of Australia, was named after the region by Spanish explorer Yñigo Ortiz de Retez. In 1545, he first used the term "New Guinea" because of the similarities in appearance between the natives of both regions.
- Maghreb is Arabic for "sunset." In some definitions, the wider region of this name includes Libya, Tunisia, Algeria, Morocco, and Mauritania. A narrower definition (the one current in France, for example) only encompasses Morocco, Algeria and Tunisia. The narrowest definition is Maghreb al-Aqsa, "the Furthest Sunset," i.e. Morocco.
Some new African countries adopted the names of kingdoms with ancient pedigree, even if they were located somewhere else entirely.
- Mauretania was the portion of the Maghreb the Berber inhabitants of which were known to the Romans as Mauri. The local kingdoms became vassals of Rome and were later annexed. The current Islamic Republic of Mauritania derives its name from ancient Mauretania but shares no territory and little else with its nominal predecessor.
- "Ghana" means "warrior king," a title conferred to the kings of the so-called Ghana Empire (it called itself "Wagadou"), which existed from around 700 to 1240 CE in an area covering parts of the modern states of Mauritania and Mali. There is no overlap with the modern country – the British colony of the Gold Coast adopted the name upon gaining independence in 1957.
- Benin City, now in Nigeria, was the capital of the old kingdom of Benin. The modern kingdom of Benin, formerly the French colony of Dahomey, is located a few hundred miles to the west.
Image produced by reddit user u/PisseGuri82, reproduced with kind permission.
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A Mercury-bound spacecraft's noisy flyby of our home planet.
- There is no sound in space, but if there was, this is what it might sound like passing by Earth.
- A spacecraft bound for Mercury recorded data while swinging around our planet, and that data was converted into sound.
- Yes, in space no one can hear you scream, but this is still some chill stuff.
First off, let's be clear what we mean by "hear" here. (Here, here!)
Sound, as we know it, requires air. What our ears capture is actually oscillating waves of fluctuating air pressure. Cilia, fibers in our ears, respond to these fluctuations by firing off corresponding clusters of tones at different pitches to our brains. This is what we perceive as sound.
All of which is to say, sound requires air, and space is notoriously void of that. So, in terms of human-perceivable sound, it's silent out there. Nonetheless, there can be cyclical events in space — such as oscillating values in streams of captured data — that can be mapped to pitches, and thus made audible.
Image source: European Space Agency
The European Space Agency's BepiColombo spacecraft took off from Kourou, French Guyana on October 20, 2019, on its way to Mercury. To reduce its speed for the proper trajectory to Mercury, BepiColombo executed a "gravity-assist flyby," slinging itself around the Earth before leaving home. Over the course of its 34-minute flyby, its two data recorders captured five data sets that Italy's National Institute for Astrophysics (INAF) enhanced and converted into sound waves.
Into and out of Earth's shadow
In April, BepiColombo began its closest approach to Earth, ranging from 256,393 kilometers (159,315 miles) to 129,488 kilometers (80,460 miles) away. The audio above starts as BepiColombo begins to sneak into the Earth's shadow facing away from the sun.
The data was captured by BepiColombo's Italian Spring Accelerometer (ISA) instrument. Says Carmelo Magnafico of the ISA team, "When the spacecraft enters the shadow and the force of the Sun disappears, we can hear a slight vibration. The solar panels, previously flexed by the Sun, then find a new balance. Upon exiting the shadow, we can hear the effect again."
In addition to making for some cool sounds, the phenomenon allowed the ISA team to confirm just how sensitive their instrument is. "This is an extraordinary situation," says Carmelo. "Since we started the cruise, we have only been in direct sunshine, so we did not have the possibility to check effectively whether our instrument is measuring the variations of the force of the sunlight."
When the craft arrives at Mercury, the ISA will be tasked with studying the planets gravity.
The second clip is derived from data captured by BepiColombo's MPO-MAG magnetometer, AKA MERMAG, as the craft traveled through Earth's magnetosphere, the area surrounding the planet that's determined by the its magnetic field.
BepiColombo eventually entered the hellish mangentosheath, the region battered by cosmic plasma from the sun before the craft passed into the relatively peaceful magentopause that marks the transition between the magnetosphere and Earth's own magnetic field.
MERMAG will map Mercury's magnetosphere, as well as the magnetic state of the planet's interior. As a secondary objective, it will assess the interaction of the solar wind, Mercury's magnetic field, and the planet, analyzing the dynamics of the magnetosphere and its interaction with Mercury.
Recording session over, BepiColombo is now slipping through space silently with its arrival at Mercury planned for 2025.
Research suggests that aging affects a brain circuit critical for learning and decision-making.
As people age, they often lose their motivation to learn new things or engage in everyday activities. In a study of mice, MIT neuroscientists have now identified a brain circuit that is critical for maintaining this kind of motivation.
Researchers find a key clue to the evolution of bony fish and tetrapods.
- A new study says solar and lunar tide impacts led to the evolution of bony fish and tetrapods.
- The scientists show that tides created tidal pools, stranding fish and forcing them to get out of the water.
- The researchers ran computer simulations to get their results.
Neil deGrasse Tyson Explains the Tides<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="9913a65f847775722d7c23d40d78938b"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/dBwNadry-TU?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
Most people believe themselves to be less at risk from COVID-19 than others similar to them, according to a recent UCL survey conducted in the U.S.