Scientists attempt to measure dolphin ‘happiness’ for the first time

1/23 New human organ discovered that was previously missed by scientists Layers long thought to be dense, connective tissue are actually a series of fluid-filled compartments researchers have termed the “interstitium”. These compartments are found beneath the skin, as well as lining the gut, lungs, blood vessels and muscles, and join together to form a network supported by a mesh of strong, flexible proteins Getty

2/23 Previously unknown society lived in Amazon rainforest before Europeans arrived, say archaeologists Working in the Brazilian state of Mato Grosso, a team led by archaeologists at the University of Exeter unearthed hundreds of villages hidden in the depths of the rainforest. These excavations included evidence of fortifications and mysterious earthworks called geoglyphs José Iriarte

3/23 One in 10 people have traces of cocaine or heroin on fingerprints, study finds More than one in 10 people were found to have traces of class A drugs on their fingers by scientists developing a new fingerprint-based drug test. Using sensitive analysis of the chemical composition of sweat, researchers were able to tell the difference between those who had been directly exposed to heroin and cocaine, and those who had encountered it indirectly. Getty

4/23 Nasa releases stunning images of Jupiter's great red spot The storm bigger than the Earth, has been swhirling for 350 years. The image's colours have been enhanced after it was sent back to Earth. Pictures by: Tom Momary

5/23 A 3D reconstruction of an African grey parrot post euthanasia Included in Wellcome Image Awards, this 3D image of an African grey parrot shows the highly intricate system of blood vessels. Scott Birch. Wellcome Images

6/23 Baby Hawaiian bobtail squid Another Wellcome Images Award winner, this time of baby Hawaiian bobtail squid. The black ink sac and light organ in the centre of the squid’s mantle cavity can be clearly seen. Macroscopic Solutions. Wellcome Images

7/23 Skeletons of 5,000-year-old Chinese ‘giants’ discovered by archaeologists The people are thought to have been unusually tall and strong. The tallest of the skeletons uncovered measured at 1.9m YouTube

8/23 Nasa discovers 75,000 mile-wide hole in the Sun Sunspots are caused by interactions with the Sun’s magnetic field and are cooler areas on the star’s surface. Nasa

9/23 View(active tab) Apple News Breaking news email Edit Revisions Workflow Clear Cache NewsScience 132 million-year-old dinosaur fossil found at factory in Surrey Paleontologists Sarah Moore and Jamie Jordan believe they have discovered a Iguanodon dinosaur, a herbivore that was around three metres tall and 10 metres long Cambridge Photographers/Wienerberger

10/23 Discovering life on Mars is less likely as researchers find toxic chemicals on its surface The Echus Chasma, one of the largest water source regions on Mars Getty Images

11/23 The Grand Prismatic Spring, the largest in the United States and third largest in the world, is seen in Yellowstone National Park. The park is famous for its geothermal activity – which includes its spectacular, flowing springs as well as the famous "Old Faithful" geyser that sprays water out every hour or so. REUTERS/Jim Urquhart

12/23 An iris clip fitted onto the eye This images is apart of the Wellcome Images Awards and shows how an artificial intraocular lens is fitted onto the eye. Used for conditions such as myopia and cataracts. Cambridge University Hospitals NHS FT. Wellcome Images

13/23 The Syrian civil war has caused the first ever withdrawal from the 'doomsday bank' Researchers in the Middle East have asked for seeds including those of wheat, barley and grasses, all of which are chosen because especially resistant to dry conditions. It is the first withdrawal from the bank, which was built in 2008. Those researchers would normally request the seeds from a bank in Aleppo. But that centre has been damaged by the war — while some of its functions continue, and its cold storage still works, it has been unable to provide the seeds that are needed by the rest of the Middle East, as it once did.

14/23 Scientists find exactly what human corpses smell like New research has become the first to isolate the particular scent of human death, describing the various chemicals that are emitted by corpses in an attempt to help find them in the future. The researchers hope that the findings are the first step towards working on a synthetic smell that could train cadaver dogs to be able to more accurately find human bodies, or to eventually developing electronic devices that can look for the scent themselves.

15/23 Black hole captured eating a star then vomiting it back out Astronomers have captured a black hole eating a star and then sicking a bit of it back up for the first time ever. The scientists tracked a star about as big as our sun as it was pulled from its normal path and into that of a supermassive black hole before being eaten up. They then saw a high-speed flare get thrust out, escaping from the rim of the black hole. Scientists have seen black holes killing and swallowing stars. And the jets have been seen before.But a new study shows the first time that they have captured the hot flare that comes out just afterwards. And the flare and then swallowed star have not been linked together before

16/23 Dog-sized horned dinosaur fossil found shows east-west evolutionary divide in North America A British scientist has uncovered the fossil of a dog-sized horned dinosaur that roamed eastern North America up to 100 million years ago. The fragment of jaw bone provides evidence of an east-west divide in the evolution of dinosaurs on the North American continent. During the Late Cretaceous period, 66 to 100 million years ago, the land mass was split into two continents by a shallow sea. This sea, the Western Interior Seaway, ran from the Gulf of Mexico to the Arctic Ocean. Dinosaurs living in the western continent, called Laramidia, were similar to those found in Asia

17/23 'Male and female brains' aren't real Brains cannot be categorised into female and male, according to the first study to look at sex differences in the whole brain. Specific parts of the brain do show sex differences, but individual brains rarely have all “male” traits or all “female” traits. Some characteristics are more common in women, while some are more common in men, and some are common in both men and women, according to the study

18/23 Life on Earth appeared hundreds of millions of years earlier than previously thought Life may have come to earth 4.1 billion years ago, hundreds of millions of years earlier than we knew. The discovery, made using graphite that was trapped in ancient crystals, could mean that life began "almost instantaneously" after the Earth was formed. The researchers behind it have described the discovery as “a potentially transformational scientific advance”. Previously, life on Earth was understood to have begun when the inner solar system was hit by a massive bombardment from space, which also formed the moon's craters

19/23 Nasa confirms Mars water discovery Nasa has announced that it has found evidence of flowing water on Mars. Scientists have long speculated that Recurring Slope Lineae — or dark patches — on Mars were made up of briny water but the new findings prove that those patches are caused by liquid water, which it has established by finding hydrated salts.

20/23 Earth could be at risk of meteor impacts Earth could be in danger as our galaxy throws out comets that could hurtle towards us and wipe us out, scientists have warned. Scientists have previously presumed that we are in a relatively safe period for meteor impacts, which are linked with the journey of our sun and its planets, including Earth, through the Milky Way. But some orbits might be more upset than we know, and there is evidence of recent activity, which could mean that we are passing through another meteor shower. Showers of meteors periodically pass through the area where the Earth is, as gravitational disturbances upset the Oort Cloud, which is a shell of icy objects on the edge of the solar system. They happen on a 26-million year cycle, scientists have said, which coincide with mass extinctions over the last 260-million years

21/23 Genetically-engineered, extra-muscular dogs Chinese scientists have created genetically-engineered, extra-muscular dogs, after editing the genes of the animals for the first time. The scientists create beagles that have double the amount of muscle mass by deleting a certain gene, reports the MIT Technology Review. The mutant dogs have “more muscles and are expected to have stronger running ability, which is good for hunting, police (military) applications”, Liangxue Lai, one of the researchers on the project. Now the team hope to go on to create other modified dogs, including those that are engineered to have human diseases like muscular dystrophy or Parkinson’s. Since dogs’ anatomy is similar to those of humans’, intentionally creating dogs with certain human genetic traits could allow scientists to further understand how they occur

22/23 Researchers discover 'lost world' of arctic dinosaurs Scientists say that the new dinosaur, known as Ugrunaaluk kuukpikensis, “challenges everything we thought about a dinosaur’s physiology”. Florida State University professor of biological science Greg Erickson said: “It creates this natural question. How did they survive up here?”