Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
Picture the Milky Way galaxy--a disk of stars and gas, a stellar spheroid and an enormous halo of dark matter. It spirals around a black hole that is supermassive--about 3 million solar masses. The Milky Way's total mass is about 100 billion solar masses--enormous to us but average among galaxies. ... > full story
Birdsongs that filled the childhoods of countless baby-boomers are rarely heard wafting on today's spring breezes.... Once-familiar avian spectacles now elude young birdwatchers... It's not your imagination... A new analysis by the National Audubon Society reveals that populations of some of ... > full story
Saturn's moons Tethys and Dione are flinging great streams of particles into space, according to data from the NASA/ESA/ASI Cassini mission to Saturn. The discovery suggests the possibility of some sort of geological activity, perhaps even volcanic, on these icy worlds. The particles were traced to ... > full story
A team of astronomers from Canada, France and the United States is announcing the discovery of a record-breaking black hole located nearly 13 billion light years from the Earth. Details of the discovery, made with the Canada-France-Hawaii Telescope, are being presented today by Dr Chris Willott, of ... > full story
Biologists have identified the genes, and determined the DNA sequences, for two key proteins in the "dragline silk" of the black widow spider -- an advance that may lead to a variety of new materials for industrial, medical and military ... > full story
A study led by a Purdue University researcher projects a 200 percent to 500 percent increase in the number of dangerously hot days in the Mediterranean by the end of the 21st century if the current rate of greenhouse gas emissions continues. The study found France would be subjected to the largest ... > full story
Researchers have discovered a way to transfer genes, which they hope will restore hearing, into diseased tissue of the human inner ear. This important step brings scientists closer to curing genetic or acquired hearing ... > full story
Biologists have found that plants get competitive when forced to share their plot with strangers of the same species, but they're accommodating when potted with their siblings. It's the first time the ability to recognize and favor kin has been revealed in ... > full story
A young star's strange elliptical ring of dust likely heralds the presence of an undiscovered Neptune-sized planet according to astronomers. Stars in the early stages of life are surrounded by dust clouds that thin out and dissipate as the star reaches maturity, becoming rings in their final ... > full story
Following more than a decade of study and advocacy by World Wildlife Fund, the Russian Government recently created the 200,000 acre Zov Tigra National Park, the first national park for the Siberian tiger. Four thousand miles east of Moscow, Zov Tigra National Park, translating to "Roar of the ... > full story
Researchers have successfully isolated and cultured human hematopoietic stem cells from fat, or adipose, tissue. Since it has been shown in some cases that tumor cells contaminating bone marrow ... > full story
Want to light up the pleasure center in your brain? Just pay your taxes, and then give a little extra voluntarily to your local food bank. Scientists have found that doing those deeds can give you ... > full story
Scientists probing the details of viral infection have discovered an intriguing surprise: in mice, herpes viruses hijack their host cells' tools for fixing DNA damage and use those tools to enhance ... > full story
At some level, all types of matter that we usually deal with have at least one thing in common - they're made of particles. The solids, liquids, gases and plasmas that surround us are built of atoms, ... > full story
Self-reported sleep complaints among the elderly serve as a risk factor for completed suicide. The study focused on data that were collected among 14,456 community elders over a 10-year period. ... > full story
Those who live in the Northeaster United States will be able to plan ahead for major storms thanks to a new ranking scale that predicts not only how ... > watch video
Biochemists have developed a new tool that can identify a strain of influenza in hours, instead of the usual days or weeks, potentially speeding up ... > watch video
The human factor -- such as the lag in reaction to unforeseen events -- is the primary cause of road accidents. Researchers are now experimenting ... > watch video
Smart meters are small computers that provide real-time information on how much electricity is being used by each customer and when, and can relay ... > watch video
A physical chemist has developed a new technique for ridding harvested produce of insect pests and microorganisms without using pesticides such as ... > watch video
Photonic crystals -- materials with precise patterns of gaps that make them reflect only selected wavelengths of light -- could soon replace the ... > watch video
Cognitive neuroscientists have now documented hundreds of cases of synesthesia -- the condition in which one sense triggers the response of a ... > watch video
Radiation therapy requires visualizing exactly where a tumor is located, usually from looking at hundreds of different X-ray , CT or PET scan images. ... > watch video
Ophthalmologists have developed new software that analyzes the shape of the patient's cornea during the LASIK procedure and automatically adjusts the ... > watch video
Anatomists and biochemists have created a detailed virtual view of vital organs in the human body, down to the level of tissues and cells. The ... > watch video
To develop designs that can survive extreme seismic events, and to devise retrofit solutions for older homes, civil engineers who specialize in ... > watch video
Investigators on a crime scene can now use a new tool for collecting chemical or biological samples. The sampler gun collects samples on a cotton pad ... > watch video
Those who live in the Northeaster United States will be able to plan ahead for major storms thanks to a new ranking scale that predicts not only how ... > watch video
Biochemists have developed a new tool that can identify a strain of influenza in hours, instead of the usual days or weeks, potentially speeding up ... > watch video
The human factor -- such as the lag in reaction to unforeseen events -- is the primary cause of road accidents. Researchers are now experimenting ... > watch video
Smart meters are small computers that provide real-time information on how much electricity is being used by each customer and when, and can relay ... > watch video
A physical chemist has developed a new technique for ridding harvested produce of insect pests and microorganisms without using pesticides such as ... > watch video
Photonic crystals -- materials with precise patterns of gaps that make them reflect only selected wavelengths of light -- could soon replace the ... > watch video
Cognitive neuroscientists have now documented hundreds of cases of synesthesia -- the condition in which one sense triggers the response of a ... > watch video
Radiation therapy requires visualizing exactly where a tumor is located, usually from looking at hundreds of different X-ray , CT or PET scan images. ... > watch video
Ophthalmologists have developed new software that analyzes the shape of the patient's cornea during the LASIK procedure and automatically adjusts the ... > watch video
Anatomists and biochemists have created a detailed virtual view of vital organs in the human body, down to the level of tissues and cells. The ... > watch video
To develop designs that can survive extreme seismic events, and to devise retrofit solutions for older homes, civil engineers who specialize in ... > watch video
Investigators on a crime scene can now use a new tool for collecting chemical or biological samples. The sampler gun collects samples on a cotton pad ... > watch video
Being diagnosed with a disease or serious condition can come as a shock. Hear what experts have to say about coming to grips with whatever ails you. 
Read Transcript