circa 300,000 BCE — Mousterian tool kit evolves among Neanderthals

The earliest known example of tool making by a hominid species, the Mousterian tools were created by members of the species homo neanderthalensis. They were primarily a flint-based technology, consisting mostly of cutting and scraping tools. Their name derives from Le Moustier in France, where such tools were discovered. However, it is unlikely that Le Moustier is the actual site of the tools’ origin, as similar tools have been found throughout Europe, the Near East and North Africa. Wherever they were invented, they clearly disseminated widely and – one assumes – swiftly.

The advent of tool making is the beginning of humanity’s technology-enabled conquest of the world. Up until this point, our ancestors were one species among many – a little smarter than most, but not especially better adapted than any other. Tool making changed that, making hominid species deadlier and more efficient hunters, and leading in time to the technological civilization that anyone reading this lives in today.

circa 284,000,000 BCE — Bolosaurid Eudibamus is the first known biped

The earliest known bipedal vertebrate, eudibamus cursoris was a small parareptile. The sole specimen that has been found (in Thuringia, Germany) measured about 25 cm long – about the size of a house cat. Reconstructions of it give it an appearance resembling a cross between a tiny velociraptor and a modern iguana.

The sole specimen of it known to science was discovered in 2000 by a paleontological team including David S. Berman, Robert R. Reisz, Diane Scott, Amy C. Henrici, Stuart S. Sumida and Thomas Martens. The species is believed to have existed for a span of about five million years or so.

circa 3,800,000,000 BCE — Autotrophic organisms evolve

The autotrophs are the first true organisms on the planet Earth. The very first of them, the first prokaryotic life on earth, were chemotrophs. Chemotrophic organisms utilise reactions with inorganic chemicals to generate the energy they need to survive. They were followed by other autoptrophs – lithotrophs, a more specialised form that rely on minerals, and phototrophs, the earliest photosynthetic organisms.

These organisms were the common origin of all life on Earth, from single-celled bacteria that have not really changed that much in millions of years, to every multi-celled organism on the planet. Even you.

circa 3,900,000 BCE — Australopithecus evolves

Australopithecus was an early proto-hominid that evolved in Eastern Africa around 4 million years ago. It consisted of a number of sub-species: A. anamensis, A. afarensis, A. sediba, and A. africanus; and two more sub-species whose genus is disputed: A. robustus and A. boisei. Over the course of two million years or so, the various Australopithecenes ranged across Eastern and Southern Africa.

The Australopithecines evolved about 2 million years after the split between the ancestral roots of humanity and chimpanzees (our closest relative), and one or more of the various sub-species of Australopithecus is likely to have been the progenitor of the Homo Genus, to which modern humanity (homo sapiens sapiens) belongs.

circa 4,540,000,000 BCE — The Earth gets cooler

In the early millenia of what is sometimes referred to as the Hadean era of the Earth, there were no rocks as we would commonly understand the term – it was too hot for them to form. Still, the Earth was slowly cooling and solidifying. It’s worth noting that the Sun itself was not as hot at this time – like the larger planets of our solar system, it was still accreting matter to itself. Rockballs like the Earth (and Mars and Venus) were largely done with this process (although the occasional meteor or cometary impacts still occurred).

By the end of this era, approximately 3,800,000,000 years ago, the Earth had cooled sufficiently to allow for the stable formation of rocks, and its surface had begun to split into tectonic plates. Most importantly for humanity’s future, life had begun: the earliest evidence of photosynthesis dates from around this time.

circa 625 BCE — Deuteronomy is composed

Traditionally, Deuteronomy, the fifth book in The Bible, was held to have been written by Moses (along with its four predecessors). In fact, the book was written much later than Moses would have been alive – eight to nine hundred years later, in fact.

Different sections of Deuteronomy were written at different times, and not in chronological order, either. The majority of the book is a very detailed legal code, including all sorts of prohibitions, punishments and proscriptions. Some of these are purely religious in nature, others detail crimes and sentences, and still others concern civil matters such as marriage. And, of course, it called for the complete destruction of the Amalekites.

Referenced in:

The Big Bang Theory — Barenaked Ladies

1879 — Albert Einstein is born

One of the most influential scientists of all time, who revolutionized physics and had no small effect on global politics while he was at it, Albert Einstein was born in Ulm, in what was then the Kingdom of Württemberg in the German Empire. He and his family were non-observant Jews, but it’s not like that mattered to the Nazis in 1933, when Einstein moved to the United States.

From undistinguished beginnings, Einstein would become the most famous scientist of the 20th century, devising both the General and Special Theories of Relativity, winning the Nobel Prize for Physics in 1921, being a key advisor of President Franklin Roosevelt regarding atomic weapons, and even being offered the Presidency of Israel in 1952 (he declined). Time Magazine named him the Person of the Century in 1999.

Referenced in:

The Big Bang Theory — Barenaked Ladies

circa 250,000,000 BCE — The super-continent Pangaea forms

Pangaea was a super-continent – an agglomeration of multiple continents – that came into being about 250 million years ago. It was composed of all the continents we know today fused into a single landmass, surrounded by a single ocean (called Panthalassa) – and was the last time such a thing occurred. In fact, it was slightly larger than the combined areas of the modern continents, as supercontinent formation tends to lead to lower sea levels.

Pangaea (the name comes from the Greek Pan meaning All and Gaea meaning Earth) existed during the Paleozoic and Mesozoic eras, and its best known inhabitants were the dinosaurs. It began to break up approximately 75 million years after it formed, although the continents would not reach anything approximating their modern positions until only about 35 million years ago, when the Indian subcontinent collided with Asia.

1993 — Encarta is first published by Microsoft

Of all the events I’ve classified as Dateless here – meaning that, for one reason or another, no way existed to date them accurately, this is the most peculiar. But the information does not seem to be anywhere on the web – even Microsoft’s own site does not record the release date of this, the earliest version of their cd-rom encyclopaedia, Microsoft Encarta.

Encarta is in many ways a bridge between traditional encyclopaedias such as the Britannica, and internet based encylopaedias such as Wikipedia. While its editing policies and hard-coded nature are in the tradition of the Britannica, its searchability represented a massive advance, as did its use of hyperlinking between articles and the inclusion of animations or archival footage to help illustrate articles.

Referenced in:

The Big Bang Theory — Barenaked Ladies

If anyone reading this owns any copy of Encarta, I’d be curious to know whether Encarta’s entry for itself lists its original release date.

circa 13,700,000,000 BCE — The Big Bang

The short version: in the beginning, there was nothing, which then exploded.

The longer version: all the matter in the universe was compressed into the smallest possible volume. Try to understand that this is so much matter that the force of gravity warps the laws of physics as we know them. The whole thing is is under so much pressure that it explodes – forming the universe as we know it as the laws of physics change radically from picosecond to picosecond, and eventually energy cools and congeals into matter.

It’s like they say: “it all started with the Big Bang!

circa 65,500,000 BCE — The Cretaceous–Tertiary extinction event wipes out the dinosaurs

Everyone loves the dinosaurs. A lot of people – if the Jurassic Park films are to be believed – would like to see them come back. But without their extinction, we wouldn’t be here today.

Even now, it’s still not clear what exactly caused the extinction event – but the best known hypothesis is that of Luis and Walter Alvarez, which states that a meteoric or cometary impact caused a nuclear winter-like effect that altered the climate drastically, wiping out something like 75% of all species alive at the time. The effects were particularly felt by larger species – which included most dinosaurs.

In the wake of the event, now open evolutionary niches were occupied by mammals and birds, including our own ancestors.

circa 2630 BCE — Imhotep designs and begins construction of the first Pyramid in Egypt

Imhotep was an Egyptian polymath who was what we would later call a Renaissance man. Of course, Imhotep had a 4000 year head-start on Leonardo. He served the Third Dynasty pharaoh Djoser as vizier, although the complete list of his titles ran:
Chancellor of the King of Egypt, Doctor, First in line after the King of Upper Egypt, Administrator of the Great Palace, Hereditary nobleman, High Priest of Heliopolis, Builder, Chief Carpenter, Chief Sculptor and Maker of Vases in Chief.

His most notable work to modern eyes is the Step Pyramid of Saqqara, in which the pharaoh Djoser was buried. It was the first pyramid, and comparatively small and primitive, but for its time it was an engineering marvel.

After his death, Imhotep was deified, one of very few Egyptians to whom this occurred (other than the pharaohs).

Referenced in:

The Big Bang Theory — Barenaked Ladies

circa 4,200,000,000 BCE — The Earth’s oceans form

The majestic oceans of planet Earth were formed neither quickly nor simply. It took literally millions of years between the first surface water’s appearance and the creation of the primordial sea.

Several factors contributed to this: the gradual cooling of the Earth was the first and most important, but also important was the slow release of water from existing minerals, the condensation of steam, and even the addition of water in the form of ice from occasional cometary collisions with the planet.

The first waters soon became the habitat of early prokaryotes – whose biochemical processes led to the formation of still more water. Indeed, it is possible that the majority of water on the planet today exists as a result of these organisms.