PHILADELPHIA — Almost everyone has experienced one memory triggering another, but explanations for that phenomenon have proved elusive. Now, University of Pennsylvania researchers have provided the first neurobiological evidence that memories formed in the same context become linked, the foundation of the theory of episodic memory.

An international team that includes Penn paleontologists is unearthing the appearance of ancient birds by using the world’s most powerful X-rays.

When the Deepwater Horizon drilling rig exploded in April 2010, it triggered one of the largest oil spills in human history, with an estimated 200 million gallons surging into the Gulf of Mexico for three months.

PHILADELPHIA — There are many kinds of cancers of the immune system, but one, Activated B-Cell Diffuse Large B-Cell Lymphoma, or ABC-DLBCL, is particularly common and pernicious.

PHILADELPHIA — Humans produce billions of clot-forming platelets every day, but there are times when there aren’t enough of them, such as with certain diseases or during invasive surgery.

PHILADELPHIA — An international team including University of Pennsylvania paleontologists is unearthing the appearance of ancient animals by using the world’s most powerful X-rays.

PHILADELPHIA -– Two faculty members from the University of Pennsylvania’s School of Engineering and Applied Science will be participating in the 17th annual Frontiers of Engineering Symposium in September.

Understanding the long-term impact of a warming climate is vexing for scientists and citizens alike; there are many variables and obscure, complex relationships between them. But one such relationship stands out, both in terms of directness and consequences: the relationship between rising temperatures and rising seas.

PHILADELPHIA — When semiconductor nanorods are exposed to light, they blink in a seemingly random pattern. By clustering nanorods together, physicists at the University of Pennsylvania have shown that their combined “on” time is increased dramatically providing new insight into this mysterious blinking behavior.

PHILADELPHIA -- Douglas Jerolmack, a professor of earth and environmental science at the University of Pennsylvania, has won the American Geophysical Union’s first Luna B.