Wikimedia
Wikipedia: Neanderthal
A detailed discussion of Neanderthals or Homo neanderthalensis. The article covers everything we know about them, for example, their discovery, their habitat, their genome, how they behaved, etc. Includes a timeline from when they were...
Smithsonian Institution
National Museum of Natural History: The Origin of the Genus Homo
The evolution of the Genus Homo is neatly laid out in a chronological fashion beginning with the key change that signaled the origin of Homo, through the evolutionary forms, finalizing with Homo sapiens.
Archaeological Institute of America
Archaeology: The New Neandertal
Latest theories on the Neandertal. Valuable information can be provided through DNA, proteins, and chemical elements.
A-Z Animals
A Z Animals: Animal Facts: Neanderthal (Homo Sapiens Neanderthalensis)
Illustrated entry describes the Neanderthal with details about its physical characteristics and statistics.
BBC
Bbc: Science and Nature: Ice People 200,000 Years Ago
A look at Neanderthals, including their appearance, their life during the Ice Age, and their extinction. Follow suggested BBC and non-BBC links for further reading.
BiologyWise
Biology Wise: Theories Behind the Extinction of Neanderthals
Discusses the discovery of Homo neanderthalensis and describes the different theories that have been put forward to explain why Neanderthals became extinct.