From the root bridges in the Indian hinterland to the grandeur of magnificent bridges in Singapore, these are the most beautiful bridges in the world.

One writer suggested that there are at least 320 longevity clinics operating around the world; some charge $100,000 or more annually for access to their magic elixirs. Unfortunately, the search for a ...

Nucleotide excision repair is a process that repairs damage to one strand of the DNA, particularly from UV irradiation, which distorts the DNA helix. The DNA flanking the damage site is cleaved to ...

cyclic AMP and cyclic GMP are universal second messengers and are sensed by receptor proteins that contain cyclic nucleotide binding (CNB) domains. In mammal, CNB domains are found in protein kinase A ...

BACKGROUND: The entrance of naive T cells into lymph nodes (LNs) is a crucial step for induction of heart transplant acceptance under costimulatory blockade. Specialized blood vessels within the LN ...

Everything on Earth is made of atoms, most of which are closely packed together in the form of minerals. Life has its uses for minerals—ask a coral reef—but its essence lies in atoms arranged as ...

The iPhone 13 line, unveiled last week at an Apple hardware event, includes new colors and design changes that give the phones an upgrade over last year's iPhone 12 models. The four models -- a base ...