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Observers in eastern Arkansas have reported at least eight independent sightings of a bird that appears to be an ivory-billed woodpecker, a species widely thought to be extinct. A video clip of one bird, though blurry, shows key features, including the size and markings, indicating that the bird is indeed an ivory-billed woodpecker, according to John W. Fitzpatrick of Cornell University and coauthors of a paper released online today by Science.

One of the world’s larges

A 15-year search for fossils in Africa has led to the discovery of eight fish specimens that are 450 million years old – 50 million years older than any previous fish fossil on the continent and amongst the oldest in the world.

Professor Richard Aldridge, of the Department of Geology at the University of Leicester, who co-led the scientific expedition, says the fossil discovery is among the most remarkable and exciting ever to be found on the continent. He said:

‘These

A group of scientists at the University of California, Berkeley, is giving new relevance to the term “sharper image” by creating a superlens that can overcome a limitation in physics that has historically constrained the resolution of optical images.

Using a thin film of silver as the lens and ultraviolet (UV) light, the researchers recorded the images of an array of nanowires and the word “NANO” onto an organic polymer at a resolution of about 60 nanometers. In comparison, curren

pH value in rock pores where organisms live acidic enough to dissolve nails, say researchers

University of Colorado at Boulder researchers say a bizarre group of microbes found living inside rocks in an inhospitable geothermal environment at Wyoming’s Yellowstone National Park could provide tantalizing new clues about ancient life on Earth and help steer the hunt for evidence of life on Mars.

The CU-Boulder research team reported the microbes were discovered in the p

Shock therapy, a controversial practice conjuring frightening images of behavior control, still has a place in schizophrenia treatment, a newly updated research review shows.

Although the data confirmed that antipsychotic drugs are still the first choice for schizophrenia treatment, they also showed that electroconvulsive, or shock, therapy clearly works, and combining both treatments can accelerate benefits to some patients, the review finds.

Dr. Prathap Tharyan, head of

New data from the Department of Energy’s Jefferson Lab shows the pentaquark doesn’t appear in one place it was expected. The result contradicts earlier findings in this same region and adds to the controversy over whether research groups from around the world have caught a glimpse of the so-called pentaquark, a particle built of five quarks.

Researchers in Jefferson Lab’s CEBAF Large Acceptance Spectrometer (CLAS) collaboration took data with a high energy photon beam on a liquid hydrogen