科学
977 条发现 · 精选自开放网络的发现，按时间从新到旧。
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The AI bubble could expose your deepest secrets
When tech companies go bankrupt, they can sell your data
BBC Future · EN
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How humans shared a world with child-eating birds
After the dinosaurs fell, giant birds took to the skies
BBC Future · EN
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Why human body temperature may be getting cooler
150 years of history have reshaped our thermal baselines
BBC Future · EN
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The people who only need four hours' sleep
Some people really are fine with remarkably little sleep
BBC Future · EN
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A never-ending childhood of malaria
How often do people in high-burden areas get malaria? Studies suggest that many children can experience five or more malaria infections a year.
Our World in Data · EN
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Is organic farming better for the environment than conventional farming?
Organic farming often wins when we compare impacts on one unit of land, but there is no clear winner when we look at impacts per unit of food production.
Our World in Data · EN
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How high is current immigration to the United States in historical perspective?
We use long-run census data to understand the scale of recent US migration trends, and how these compare to previous centuries.
Our World in Data · EN
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What impact will climate change have on malaria?
More than 600,000 people die from malaria every year. Will climate change make this worse?
Our World in Data · EN
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A 73% average decline in wildlife populations: an overview of the 2026 Living Planet Index report
A guide to understanding the Living Planet Index and what it does and doesn’t mean.
Our World in Data · EN
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When do people experience mental health conditions for the first time?
Knowing when people are most at risk allows us to offer support when it might make the biggest difference.
Our World in Data · EN
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How much development aid is spent on climate change?
Around one-fifth of development aid is spent on climate-related projects. But what does climate-related mean, and does it crowd out other aid projects?
Our World in Data · EN
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Around half of people will experience a mental health issue in their lifetime
What is someone’s risk of developing depression, anxiety, or other mental health issues at some point in their life?
Our World in Data · EN
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How much oxygen comes from the ocean?
Scientists estimate that 50-80% of the oxygen production on Earth comes from the ocean. The majority of this production is from oceanic plankton — drifting plants, algae, and some bacteria that can photosynthesize. One particular species, Prochlorococcus, is the smallest photosynthetic organism on Earth. But this little bacteria produces up to 20% of the oxygen in our entire biosphere. That’s a higher percentage than all of the tropical rainforests on land combined. Continue reading →
NOAA Ocean Facts · EN
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How long do Greenland sharks live?
Scientists have suspected for a while that Greenland sharks lived extremely long lives, but they didn’t have a way to determine how long. The age of other shark species can be estimated by counting growth bands on fin spines or on the shark’s vertebrae, much like rings on a tree. Greenland sharks, however, have no fin spines and no hard tissues in their bodies. Their vertebrae are too soft to form the growth bands seen in other sharks. Scientists could only guess that the sharks lived a long time based on what they knew — the sharks grow at a very slow rate (less than 1 cm per year) and they c
NOAA Ocean Facts · EN
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What is a barrier island?
Barrier islands form as waves repeatedly deposit sediment parallel to the shoreline. As wind and waves shift according to weather patterns and local geographic features, these islands constantly move, erode, and grow. They can even disappear entirely. They are generally separated from the mainland by tidal creeks, bays, and lagoons. Beaches and sand dune systems form on the side of the island facing the ocean; the side facing the shore often contains marshes, tidal flats, and maritime forests. These areas are important habitat for seabirds, fish and shellfish, and and nesting sea turtles. Cont
NOAA Ocean Facts · EN
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What is latitude?
Lines of latitude, also called parallels, are imaginary lines that divide the Earth. They run east to west, but measure your distance north or south. The equator is the most well known parallel. At 0 degrees latitude, it equally divides the Earth into the Northern and Southern hemispheres. From the equator, latitude increases as you travel north or south, reaching 90 degrees at each pole. Continue reading →
NOAA Ocean Facts · EN
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What is longitude?
Lines of longitude, also called meridians, are imaginary lines that divide the Earth. They run north to south from pole to pole, but they measure the distance east or west. The prime meridian, which runs through Greenwich, England, has a longitude of 0 degrees. It divides the Earth into the eastern and western hemispheres. The antimeridian is on the opposite side of the Earth, at 180 degrees longitude. Though the antimeridian is the basis for the international date line, actual date and time zone boundaries are dependent on local laws. The international date line zigzags around borders near th
NOAA Ocean Facts · EN
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What is the Atlantic Meridional Overturning Circulation (AMOC)?
The ocean’s water is constantly circulated by currents. Tidal currents occur close to shore and are influenced by the sun and moon. Surface currents are influenced by the wind. However, other, much slower currents that occur from the surface to the seafloor are driven by changes in the saltiness and ocean temperature, a process called thermohaline circulation. These currents are carried in a large "global conveyor belt," which includes the AMOC. AMOC stands for Atlantic Meridional Overturning Circulation. The AMOC circulates water from north to south and back in a long cycle within the Atlanti
NOAA Ocean Facts · EN
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What are nature-based solutions?
Infrastructure projects that intentionally use natural and nature-based habitats and processes to reduce risks and deliver multiple benefits are referred to as nature-based solutions. Continue reading →
NOAA Ocean Facts · EN
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What is a Kelvin wave?
Kelvin waves are slow-moving, relatively flat, warm water waves that stretch thousands of miles across the Pacific Ocean. Continue reading →
NOAA Ocean Facts · EN
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A Dog Left a Paw Print on This Mud Brick 4,000 Years Ago. Archaeologists Discovered It in the Rubble of a Bronze Age House
The brick was found at Tavsanli Hoyuk, an archaeological site in western Turkey. Humans and dogs in this region have had a close relationship for thousands of years
Smithsonian Magazine · EN
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Crafted From Bone, This 2,800-Year-Old Flute Unearthed in Troy May Have Been Played Around the Time That Homer Composed 'The Iliad' and 'The Odyssey'
After more than 150 years of excavations, the object is the first musical instrument ever discovered in the ruins of the ancient city, which is located in modern-day Turkey
Smithsonian Magazine · EN
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Tired of the Winter Blues? The Unique Festival of Lights Zagreb Marks the Much-Anticipated Arrival of Spring
From March 17 to 21, 2027, Croatia’s capital transforms into a dazzling open-air gallery, illuminated by light installations and artworks from local and international artists
Smithsonian Magazine · EN