The first diamonds were discovered more than five thousand years ago in India and have held mankind for many enigmas since then: how was it that diamond was harder than any known matter, what was the composition of this mineral, etc.
Wednesday, 19 October 2016
Thursday, 6 October 2016
Feathers appear to have evolved from scales and are composed of B-keratin. Scales and feathers develop in a similar fashion. In actuality, birds have both feathers and scales. You can find scales on the legs and feet of most birds.
Feathers are incredibly strong and yet are incredibly flexible. To allow both lift and forward movement, feathers can bend at almost a right angles.