- Ban work emails, after hours
- Drug syndicate smashed
- Save Brisbane's history
- Electricity savings on way
- GE Money vulnerable
- Whooping cough more resilient
- Dog toilets for Brisbane airport
- Ita hits farmers
- RSS Syndicate this blog (XML)
What we're talking about
- Gordon Heelan on Save Brisbane's history Do you think the Bonded Store Buildings should be saved and heritage listed?Yes I do as history is a important part of our ... more
- Bob Lord on Electricity savings on way So the plan is to increase the risk of blackouts because people aren't prepared to pay for the excellent electricity service ... more
- Bob Lord on “$80 billion black cloud" Major infrastructure investment occurring in Qld over the past few years before LNP according to the Commission of Audit:1. ... more
- Gus Nathan on Vale, Haydn Sargent Really sad to learn of Hayden Sargent's passing away. Ever since our arrival in Australia in 1975, we tuned to 4 BC daily ... more
- David T. on "Oh, Where's the feeling?" Yes James, I'm waiting for you to say something sensible. more
- James W on “$80 billion black cloud" So the $4Bn per year we pay in interest could pay for so many schools, so many klms of roads and so many hospitals. What do ... more
- James W on "Oh, Where's the feeling?" mick, AUstralia had never had AAA from all 3 major ratings agencies before Rudd was PM, FACT. more
- Warren on Live webcam over Brisbane River. I would like to use your webcam. Seeing what you and your guests look like in the studio adds enjoyment to listening to ... more
- mick on Colmslie saves it's Fish Factory Khushdeep ring Rudd's missus she is supposed to be the guru in placing people into jobs at a great expense to the taxpayer. more
- mick on "Oh, Where's the feeling?" the recent state labor governments are the ones who have lost the aaa ratings in recent years. In Fact the most Triple A ... more
- mick on Obesity a personal issue? Jack2967 obesity in itself can be the symptom of many other chronic illnesses and the result of medications used to treat ... more
- Where is it? on LIVE NRL returns to 4BC What's happened to Fresh on Sunday? Disappeared when the CCT returned. Are you going to put it on at a different time?Would ... more
- victor Madison on Promising signs for HIV cure I want to say hello to the world at large, I am very grateful for the good deeds DR.OGODOMEN did for me, I was a HIV ... more
- Elisa Jed on MiniMovers fleet sabotaged Did they find the person that sabotaged the moving trucks? This is definitely a hard time to lose so many trucks. I think ... more
- Annie Johnston on Boland back for Brisbane Warren, it is so good to see you are back on the radio. 4BCs gain is ABC's loss. And what a loss it is! Your league of ... more
- Steve Yeppoon on Boland back for Brisbane Driving out to work this morning and planning to listen to Warren for the 3 hour drive. Disappointed to learn Warrens not on ... more
- James W on "Oh, Where's the feeling?" Gone quite quiet again David T. more
- Bob Lord on Mobile tech leading way Ah. Just a little. Currently 2 smartphones, 2 tablets and a laptop make use of a cable broadband, home wifi and a portable ... more
- kerry jacques on Boland back for Brisbane I likewise , loved Saturday Mornings with Warren , just the variety of his programme was excellent , come on 4bc , move it ... more
- Greg Brown on Wivenhoe dam release If Wivenhoe and Somerset Dams are raised by 8m and a new dam is built near linville, the Somerset Regional Council will ... more
Caveman, advanced thinkers
Paleontologists say they have found small blades in a South African cave proving that man was an advanced thinker making stone tools 71,000 years ago - millennia earlier than thought.
The find suggests early humans from Africa had a capacity for complex thought and weapons production that gave them a distinct evolutionary advantage over Neanderthals, say the authors of a study published in Nature.
Scientists agree that our lineage appeared in Africa more than 100,000 years ago, but there is much debate about when Homo sapiens' cultural and cognitive character began resembling that of modern humans.
Small, manufactured blades such as those found in hunting arrows were first thought to have appeared in South Africa between 65,000 and 60,000 years ago.
Now, a team of scientists say they have found much older blades, called microliths and produced by chipping away at heat-treated stone, in a cave near Mossel Bay on South Africa's south coast.
"Our research... shows that microlithic technology originated early in South Africa, evolved over a vast time span (about 11,000 years) and was typically coupled to complex heat treatment," the study authors wrote.
"Advanced technologies in Africa were early and enduring," they said, adding that long absences of tool-use evidence in the palaeontological record are explained by the relatively small number of sites excavated to date, not by an ebb and flow in early man's technological know-how.
The find is evidence that early modern humans in South Africa had the ability to make complex designs and teach others to copy them, said the researchers.
This would have allowed them to produce tools like arrows with a much longer killing distance than hand-cast spears.
"Microlith-tipped projectile weapons increased hunting success rate, reduced injury from hunting encounters gone wrong, extended the effective range of lethal interpersonal violence," wrote the team.
It would also have conferred "substantive advantages on modern humans as they left Africa and encountered Neanderthals equipped only with hand-cast spears".
Neanderthals lived in parts of Europe, Central Asia and the Middle East for up to 300,000 years but appear to have vanished some 40,000 years ago.
In a comment on the study, also published by Nature, anthropologist Sally McBrearty from the University of Connecticut said humans making the monoliths would have chipped small blades from stone carefully selected for its texture and heat-treated to make it easier to work with.
They would then have retouched the blades into geometric shapes, probably for use in arrows to be shot from bows.
This, in turn, meant the makers would have had to collect other materials such as wood, fibres, feathers, bone and sinew over a period of days, weeks or months, interrupted by other, more urgent tasks.
"The ability to hold and manipulate operations and images of objects in memory, and to execute goal-directed procedures over space and time, is termed executive function and is an essential component of the modern mind," McBrearty wrote.