Tagged: nature

Volcano and Aurora in Iceland

Sometimes both heaven and Earth erupt. In Iceland in 1991, the volcano Hekla erupted at the same time that auroras were visible overhead. Hekla, one of the most famous volcanoes in the world, has erupted at least 20 times over the past millennium, sometimes causing great destruction.

Why can’t we regrow limbs?

Have you ever wondered why humans lack the regenerative ability found in salamanders and some lizards? Why can these animals regrow their amputated limbs and we can’t? Scientific American contributor Yasmin Tayag explains.