Botox May Reach Central Nervous System

Botox May Reach Central Nervous System

Botulinum toxin, produced by the bacterium Clostridium botulinum, is one of the most poisonous biological substances known, but in true' the dose makes the poison' fashion,  Botulinum neurotoxin…
Big 6? Capitanian Extinction Gets New Evidence

Big 6? Capitanian Extinction Gets New Evidence

Since the Cambrian Explosion, ecosystems have suffered repeated mass extinctions, 5 of which wiped out half of all species: The Cretaceous–Paleogene extinction, the Triassic–Jurassic extinction, the…
Pediatric Melanoma Declined While Adult Rose

Pediatric Melanoma Declined While Adult Rose

Melanoma, an aggressive form of skin cancer, has been increasing in incidence in adults over the past 40 years. Pediatric melanoma is rare (5 or 6 children per million) but some studies indicate…
Macrophages As T-Cell Immune Response Primers

Macrophages As T-Cell Immune Response Primers

A new study demonstrates that macrophages can effectively substitute for so-called dendritic cells as primers of T-cell-dependent immune responses. They instead stimulate a broader-based response.…