Toggle light / dark theme

This Tiny Frog Emits a Powerful Ultrasonic Scream No Human Can Hear

The Brazilian Atlantic Rainforest is filled with the ear-piercing ‘screams’ of a tiny amphibian in distress, but until now, we humans have been oblivious to their cries.

For the first time, researchers have recorded South American frogs crying out at a frequency that totally bypasses the human ear – but which would be quite unpleasant to animals with the right kind of receivers.

The leaf litter frog (Haddadus binotatus) is the most abundant species of frog in the forest community. Though abundant, they’re tiny – the largest of the species are females, and even they that barely reach 64 millimeters (2.5 inches) in length.

FSD Stories

Explore the fun and excitement that comes with Tesla FSD We have curated Tesla FSD test drives, stories, and shorts into a map layout so you can explore how people are trying the Tesla FSD and the reactions they are getting. For best results expand the map to full screen and select from these options.

FSD drives: 66 stories: 14 shorts: 6

If you want to add your FSD adventure video, send us an email to: FSD@DigitalHabitats.global Include the youtube video url, and any comments you want to share smile

Many-Valued Logic (Stanford Encyclopedia of Philosophy)

Reminds me of the world of null A by AEVan Vogh.


Many-valued logics are non-classical logics. They are similar to classical logic because they accept the principle of truth-functionality, namely, that the truth of a compound sentence is determined by the truth values of its component sentences (and so remains unaffected when one of its component sentences is replaced by another sentence with the same truth value). But they differ from classical logic by the fundamental fact that they do not restrict the number of truth values to only two: they allow for a larger set W W of truth degrees.

Mystery Solved? Scientists Shed New Light on Mysterious Giant Bones That Have Puzzled Paleontologists for 150 Years

Several similar large, fossilized bone fragments have been discovered in various regions across Western and Central Europe since the 19th century. The animal group to which they belonged is still the subject of much debate to this day. A study carried out at the University of Bonn could now settle this dispute once and for all: The microstructure of the fossils indicates that they come from the lower jaw of a gigantic ichthyosaur. These animals could reach 25 to 30 meters in length, a similar size to the modern blue whale. The results have now been published in the journal PeerJ.

In 1,850, the British naturalist Samuel Stutchbury reported a mysterious find in a scientific journal: A large, cylindrical bone fragment had been discovered at Aust Cliff – a fossil deposit near to Bristol. Similar bone fragments have since been found in various different places around Europe, including Bonenburg in North Rhine-Westphalia and in the Provence region of France. More than 200 million years ago, these areas were submerged beneath a huge ocean that covered vast swathes of Western and Central Europe. Fossil remains from the animal world of that time – including marine and coastal dwellers – have been preserved in the sediment.

There is still some debate to this day about the animal group to which these large, fossilized bones belonged. Stutchbury assumed in his examination of the first finds that they came from a labyrinthodontia, an extinct crocodile-like land creature. However, this hypothesis was questioned by other researchers, who believed instead that the fossils came from long-necked dinosaurs (sauropods), stegosaurs, or a still completely unknown group of dinosaurs.