Science

More than one-third of Earth's tree species are at risk of extinction, with logging, forest destruction for agriculture and urban development, and human-caused global heating most responsible for this "frightening" development that threatens life as we know it, according to a report published Monday.

The 2024 Global Tree Assessment—released at the United Nations Biodiversity Conference (COP16) in Cali, Colombia and published as part of this year's International Union for Conservation of Nature (IUCN) "Red List" of threatened species—warns that more than 16,000 of the 47,000 tree species analyzed in the report are at risk of extinction.

China's only woman spaceflight engineer will be among a crew of three astronauts blasting off on a "dream" mission to the Tiangong space station in the early hours of Wednesday.

The new Tiangong team will carry out experiments with an eye to the space program's ambitious goal of placing astronauts on the Moon by 2030 and eventually constructing a lunar base.

You can probably picture a vampire: Pale, sharply fanged undead sucker of blood, deterred only by sunlight, religious paraphernalia and garlic. They’re gnarly creatures, often favorite subjects for movies or books. Luckily, they’re only imaginary … or are they?

There are real vampires in the world of bats. Out of over 1,400 currently described bat species, three are known to feed on blood exclusively.

If you’ve ever gone to look up a quick fact and just kept browsing from one article (or page, or video), to another, to another – then you know the feeling of “going down a rabbit hole”. This experience of curiosity-led online wandering has become synonymous with the free, user-created encyclopedia Wikipedia.

Founded in 2001, Wikipedia is today one of the world’s most popular websites. With more users than Amazon, Netflix, TikTok or ChatGPT, the site is a go-to source for people to learn about and discover new interests.

Heads of state, ministers and UN Secretary General Antonio Guterres arrive in Cali Tuesday hoping to add impetus to grinding talks on ways to save nature from human destruction.

The 16th so-called Conference of Parties (COP16) to the UN's Convention on Biological Diversity (CBD) has the urgent task of coming up with monitoring and funding mechanisms to achieve 23 nature protection goals agreed in Canada two years ago.

The Western European hedgehog -- the prickly, nocturnal critter people love to encounter in the garden -- is in decline, mowed down by cars as its shrinking habitat forces it to move ever closer to humans.

An updated Red List of Threatened Species published Monday at the UN's COP16 biodiversity summit in Cali, Colombia, downgraded the hedgehog's status from "least concern" to "near threatened."

Every rainy season for the past 12 years, floods have swept through 67-year-old Idris Egbunu's house in central Nigeria.

It is always the same story -- the Niger River bursts its banks and the waters claim his home for weeks on end, until he can return and take stock of the damage.

The world's nations must commit to dramatically slashing greenhouse gas emissions in the near future or risk a "catastrophic" rise in global average temperatures, a key United Nations climate report published Thursday warned.

"It is still technically possible to meet the 1.5°C goal" set out in the Paris agreement, "but only with a G20-led massive global mobilization to cut all greenhouse gas emissions, starting today," the United Nations Environmental Program (UNEP) said in a summary of its annual Emissions Gap Report.

A group of 44 climate scientists from 15 different countries warn there is a "serious risk" that soaring global temperatures will trigger the "catastrophic" collapse of a crucial system of ocean currents—and possibly sooner than established estimates considered likely.

The Atlantic Meridional Overturning Circulation, or AMOC, moves warm water up from the tropics to the North Atlantic, where it sinks and cools before returning south. It is, as letter signatory and oceanographer Stefan Rahmstorf toldThe Guardian, "one of our planet's largest heat transport systems." If it collapsed, it could lower temperatures in some parts of Europe by up to 30°C.

The human brain is a marvel of complexity. It contains specialized and interconnected structures controlling our thoughts, personality and behavior.

The size and shape of our brains also play a crucial role in cognitive functions and mental health. For example, a slightly smaller hippocampus, the structure responsible for regulation of memory and emotion, is commonly seen in depression. In dementia, atrophy of the hippocampus is correlated with memory loss and cognitive decline.

A "doomsday vault" in the Arctic designed to safeguard the world's plant diversity has received a new deposit of thousands of seed samples, including Palestinian ones amid war and hunger in Gaza, it said on Wednesday.

Opened in 2008, the Global Seed Vault offers a safety net in case of natural catastrophe, war, climate change, disease or manmade disasters.

Psychologists know that childhood trauma, or the experience of harmful or adverse events, can have lasting repercussions on the health and well-being of people well into adulthood. But while the consequences of early adversity have been well researched in humans, people aren’t the only ones who can experience adversity.

If you have a rescue dog, you probably have witnessed how the abuse or neglect it may have experienced earlier in life now influence its behavior – these pets tend to be more skittish or reactive. Wild animals also experience adversity. Although their negative experiences are easy to dismiss as part of life in the wild, they still have lifelong repercussions – just like traumatic events in people and pets.

Each October, as the days shorten and the air grows crisp, millions of Americans prepare for the beloved – and often sugar-fueled – tradition of Halloween. From jack-o’-lanterns glowing on porches to costumes ranging from the whimsical to the gory, Halloween is a time of playful scares, childhood memories and, of course, candy.

But as the wrappers pile up and the sugar rush hits, there’s something far more sinister brewing beneath the surface: the negative effects of candy on your gut health.