These mysterious objects can have masses several million or billion times that of the Sun and are so dense that they warp space time around them. As far as astronomers know, all galaxies harbour a ...

Painted lady butterflies are world travelers. The ones we encounter in Europe fly from Africa to Sweden, ultimately returning to areas north and south of the Sahara.

“ Tropical regions are home to rich biodiversity and diverse ecosystems, including vital natural land types such as forests. There is a more consistent consensus that temperature increases in tropical ...