A team o...

A team of researchers affiliated with multiple institutions in the U.S. and one in Japan has developed a new type of vaccine that helps the immune system destroy cancerous tumors by overcoming their defense system. In their paper published in the journal Nature, the group describes the new vaccine and its effects in mouse and rhesus macaque models.

Until recently, the only tools available to doctors treating cancer patients have been chemotherapy, radiation treatment and surgery. More recently, medical researchers have been exploring vaccines in the fight against cancer—the development of a vaccine against HPV-related diseases, for example, has reduced the risks of cervical and other types of cancers...

Researchers at ETH Zurich have succeeded for the first time in trapping excitons—quasiparticles consisting of negatively charged electrons and positively charged holes—in a semiconductor material using controllable electric fields. The new technique is important for creating single photon sources as well as for basic research.

In semiconductor materials, electric current can be conducted both by electrons and by positively charged holes, or missing electrons. Light hitting the material can also excite electrons to a higher energy band, leaving behind a hole in the original band...

When we look out into space, all of the astrophysical objects that we see are embedded in magnetic fields. This is true not only in the neighborhood of stars and planets, but also in the deep space between galaxies and galactic clusters. These fields are weak—typically much weaker than those of a refrigerator magnet—but they are dynamically significant in the sense that they have profound effects on the dynamics of the universe. Despite decades of intense interest and research, the origin of these cosmic magnetic fields remains one of the most profound mysteries in cosmology.

In previous research, scientist...