Polonium-210

radioactive01 (2)

What exactly is Polonium-210, and why is it so deadly?

Polonium-210 was allegedly used to murder Alexander Litvinenko, o­n November 23, 2006. According to Britain’s Health Protection Agency, traces of polonium were found in his urine, as well as in several locations he had visited shortly before becoming ill.

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Adaptation and Natural Selection

Here are some useful resources for the teaching of Adaptation and Natural Selection
lifeonearth01

The following resouces are available from the pbs website

Evolution of  Camouflage  This website provides a number of examples of how animals have survived by evolving survival mechanisms such as  mimicry, camouflage, and disguise.

How the woodpecker avoids a headache .  What specialised mechanisms are required in order for a woodpecker to reach and eat insects buried in trees?

Mimicry  Survival often requires the mechanism to mimic the looks and sounds of other living things. This can be used successfully in reproduction, hiding from predators, and ensuring that prey don’t recognise the predator.

The Frustration Principle  Survival often depends o­n a number of desirable traits. This resource looks at the work of Karl Niklas o­n the evolution of trees.

Evidence for Evolution

lifeonearth01

Here are some useful o­nline resources for a study of  ‘Evidence for Evolution’

The following websites  provide useful information resources  for the evidence for evolution….

Becoming Human is a superb resource.

 

becomehuman01

A fascinating journey through the story of  human evolution. Excellent use of multimedia resources. Another gem from The Arizona State University

Other resources:

Dr. George Backgrounders (Evolution)

Early Theories of Evolution

Evidence for Evolution

Evolution (Wikipedia)

Past Lives

Evolution Evidence Page