An international team of astronomers has cracked the case of a mysterious galaxy that has suddenly dimmed after shining brightly for 30 years.
Saturday, 24 September 2016
Friday, 23 September 2016
Thursday, 22 September 2016
Wednesday, 21 September 2016
Wednesday, 14 September 2016
An unusual cluster of stars is a "living fossil" from the early Milky Way. The cluster, known as Terzan 5, contains two distinct types of stars with an age gap of up to 7 billion years. The discovery has important implications for our understanding of how galaxies formed in the early universe.
Wednesday, 7 September 2016
Wednesday, 31 August 2016
Friday, 26 August 2016
Wednesday, 10 August 2016
Thursday, 4 August 2016
Wednesday, 3 August 2016
Saturday, 30 July 2016
Friday, 29 July 2016
Thursday, 28 July 2016
Wednesday, 27 July 2016
Researchers have developed hierarchical metallic metamaterial with multi-layered, fractal-like 3-D architectures to create structures at centimetre scales incorporating nanoscale features.
Tuesday, 26 July 2016
Monday, 25 July 2016
Sunday, 24 July 2016
When honeybee hives get too hot, thirsty bees beg their specialised, water-foraging sisters for more liquid, which ends up cooling the colony. Honeybees have a few strategies for chilling out: some fan the nest, others leave the hive to increase air flow, and a few zip off looking for ponds or puddles. These “water collector” bees fill their bellies with water, fly back home, then regurgitate the liquid. Other bees slurp it up and spit it out around the hive, allowing the colony to cool as the water evaporates.
Thursday, 21 July 2016
Wednesday, 20 July 2016
Wednesday, 6 July 2016
Early Polynesian sailors criss-crossed the Pacific for hundreds of years, travelling as far as 2,500 kilometres, according to a new chemical analysis of centuries-old stone tools. The findings suggest there was ongoing, post-colonisation contact between the communities of the eastern Pacific from about AD1300 to the 1600s.
Wednesday, 22 June 2016
Thursday, 16 June 2016
Wednesday, 15 June 2016
A 700,000-year-old hobbit has been discovered on the Indonesian island of Flores, shedding new light on human evolution. The dwarf-like ancient relative of modern man stood just one metre tall and has been dated at half a million years older than a hobbit found on the island a decade ago. The researchers argue their fossil find descended from Homo erectus, which would suggest an incredible case of evolutionary reversal where human bodies — including brains — actually shrunk.
The simplest explanation is that the "hobbits" are Australopithecines. The material evidence is consistent with this and inconsistent with both Homo habilis and Homo erectus. The view that they were later species that "shrunk" is not the simplest theory, and the proposition that smaller primate brains would be more adaptive than larger brains is exceedingly unlikely and needs plausible supporting argument. There are many examples of other primates (orang utans, gibbons, japanese macaques) migrating enormous distances from their place of speciation.
Thursday, 9 June 2016
A new look at ancient bones with the latest DNA technology has confirmed Aboriginal Australians as the continent's first people. Researchers say the findings overturn a 2001 paper that argued the oldest known Australian human remains found near Lake Mungo in New South Wales were from an extinct lineage of modern humans that occupied the continent before Aboriginal Australians.
Wednesday, 8 June 2016
Friday, 3 June 2016
Ancient charred grains of rice and mung beans excavated from Madagascar provide the first archaeological evidence that ancestors of people living on the East African island known as Malagasy came from South-East Asia.
Thursday, 2 June 2016
Wednesday, 1 June 2016
Thursday, 26 May 2016
Archæological evidence now suggests Neanderthals were capable of symbolic thought, had a basic knowledge of chemistry, medicine and cooking, and perhaps some capacity for speech. They may even have taught modern humans new artisanal skills when the two species met and interbred.
A reassessment of evidence from Bruniquel cave, near Toulouse in south-west France, suggests even more Neanderthal sophistication. In one chamber, 336 metres from the cave entrance, are enigmatic structures – including a ring 7 metres across – built from stalagmites snapped from the cave floor.
Wednesday, 25 May 2016
The alpha male of a group of snub-nosed monkeys and his dying partner spent a final, tender hour together beneath the tree from which she had fallen minutes earlier, cracking her head on a rock. Before she succumbed, he gently touched and groomed her. And after she was dead he remained by her side for 5 minutes, touching her and pulling gently at her hand, as if to try and revive her.
Friday, 20 May 2016
For the first time, trees have been shown to undergo physical changes at night that can be likened to sleep, or at least to day-night cycles that have been observed experimentally in smaller plants. Branches of birch trees have now been seen drooping by as much as 10 centimetres at the tips towards the end of the night.
Thursday, 19 May 2016
Wednesday, 18 May 2016
The oldest fossils of cosmic dust ever discovered provide a glimpse into atmospheric conditions above the Earth more than 2.7 billion years ago and could do the same on other planets.
Saturday, 14 May 2016
Friday, 13 May 2016
A fragment of the world's oldest known ground-edge axe has been found in the remote Kimberley region of northern Australia. The discovery pushes back the technological advance to between 45,000 to 49,000 years ago, and coincides with the arrival of people in Australia. The fragment is 10,000 years older than the previous oldest known fragments found in northern Australia in 2010.
Thursday, 12 May 2016
Air bubbles trapped in 2.7 billion-year-old lava flows in the Pilbara suggest the Earth's atmosphere weighed less than half that of today and was far thinner than previously thought. The discovery has forced a rethink of how the Earth managed to stay relatively ice-free during that period, despite the Sun being much cooler than it is today.
Thursday, 5 May 2016
A large carnivore — most likely a hyena — ate an ancient human 500,000 years ago, according to the discovery of teeth marks on a thighbone found in a Moroccan cave. The fossilised femur provides the first definitive evidence that carnivores ate early humans in North Africa during the Middle Pleistocene era.
Wednesday, 4 May 2016
Astronomers have discovered three planets orbiting the habitable zone of an ultra-cool dwarf star just 40 light-years from Earth. The discovery is the first evidence supporting the hypothesis that these very low-mass and low-temperature stars should have Earth-sized or smaller planets orbiting them.
Thursday, 28 April 2016
Unlike some types of dinosaurs that were reliant on their parents after they hatched, the offspring of the world's largest vertebrates to have ever walked the Earth were probably independent soon after birth.
Wednesday, 27 April 2016
Sunday, 24 April 2016
The oldest ever human nuclear DNA to be reconstructed and sequenced reveals Neanderthals in the making – and the need for a possible rewrite of our own origins. The 430,000-year-old DNA comes from mysterious early human fossils found in Spain’s Sima de los Huesos, or “pit of bones”.
Saturday, 23 April 2016
Recent neuro-imaging suggests insects are fully hardwired for both consciousness and egocentric behaviour, providing strong evidence that organisms from flies to fleas exhibit both. Consciousness comes in many levels, and insects have the capacity for at least one basic form: subjective experience.
Friday, 22 April 2016
Thursday, 21 April 2016
Wednesday, 20 April 2016
Ancient bears evolved to become giants so they could scavenge prey killed by others, a new study suggests.
Note that this reporting misconstrues evolution in terms of purpose instead of cause and result.
Tuesday, 19 April 2016
Bottlenose dolphins have been observed chattering while cooperating to solve a tricky puzzle – a feat that suggests they have a type of vocalisation dedicated to cooperating on problem solving.
Friday, 15 April 2016
When the first prehistoric people trekked into South America toward the end of the Ice Age, they found a wondrous, lush continent inhabited by all manner of strange creatures like giant ground sloths and car-sized armadillos.