New Scientist

A dolphin that lived in the Amazon 16 million years ago grew to a length of 3.5 metres – larger than any other freshwater dolphin

Ten years’ worth of observations of a wild chimpanzee community show that most adults stop playing when food is short, but not mothers and their young

These stunning photographs, taken by botanist Chris Thorogood, chart the quest to protect species of Rafflesia, which are on the brink of extinction in the Philippines

There is more lurking below the surface of Arrakis than sandworms. Dune author Frank Herbert had a keen interest in fungi, and so should we, says Corrado Nai

A ‘gene drive’ that spreads through plant populations could be used to wipe out pests such as superweeds, or to help save species by making them resistant to heat or disease

Populations of moths living in urban places may have evolved smaller wings to limit how much bright city lights disrupt their lives

Since their introduction in the 1800s, giant sequoia trees in the UK have grown up to 55 metres tall and capture 85 kilograms of carbon a year on average

Some studies have claimed that plants emit sounds when stressed and might perceive the distress calls of other plants, but a review finds the evidence is lacking

When the moon hides the sun in a total solar eclipse, some animals seem to think that it is briefly nighttime, while others pace anxiously or even gaze up at the sky

Unlike most other animals, the cave-dwelling Mexican tetra doesn’t get a fatty liver when it is malnourished – and its secrets could lead to medical benefits for other species

Two fossil claws found on Seymour Island reveal that phorusrhacids, or terror birds, lived in Antarctica 50 million years ago and were probably the apex predator

As a clownfish spends time with an anemone, its mucus coating begins to change. Chemical tweaks to sugars in the slime may calm stinging cells in anemone tentacles

After hatching from eggs, young ringed caecilians feed on their mother’s skin, but also on a milk-like substance secreted from her rear end

Mass mortality events at salmon farms have been getting more frequent since 2011, sometimes killing millions of fish at once, with causes including heatwaves and poor living conditions

Dogs with a mutation in the POMC gene, common in Labradors and flat-coated retrievers, have a stronger appetite for snacks between meals and a lower metabolic rate

Puzzles that bumblebees cannot solve on their own can be cracked with help from another bee, adding to research on the transmission of culture among insects

A company called Colossal claims it has taken a "momentous step" towards bringing back the woolly mammoth. Here's all you need to know about whether such a feat is possible

Five elephant calves have been found buried in drainage ditches on tea-growing estates in India in a rare example of burial behaviour in non-human animals

Five new varieties of Penicillium roqueforti, the fungus used to make blue cheese, might rescue the fungus from a genetic dead end and produce pharmaceutical compounds

Genetic analysis of the California two-spot octopus reveals that the species has sex chromosomes, and they may have originated up to 378 million years ago