Various kinds of masks obscure our view of our galaxy, the Milky Way, as well as of other galaxies. Masks of interstellar dust affect our measurements within galaxies, on scales ranging from individua
The country: South Africa. The period: early 1960s. Billions of snowflakes fell to the ground. Why is the snowflake six cornered, asked Kepler? To each researcher, there is the mystery of 'the thing i
