- Borosilicate glass (Wikipedia)
Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents. Borosilicate glasses are known for having very low coefficients of thermal expansion (≈3 × 10−6 K−1 at 20 °C), making them more resistant to thermal shock than any other common glass. Such glass is subjected to less thermal stress and can withstand temperature differentials without fracturing of about 165 °C (300 °F). It is commonly used for the construction of reagent bottles and flasks as well as lighting, electronics, and cookware.
- Lesotho (Wikipedia)
Lesotho (/lɪˈsuːtuː/ lih-SOO-too, Sotho pronunciation: [lɪˈsʊːtʰʊ]), formally the Kingdom of Lesotho, is a landlocked country in Southern Africa. As an enclave of South Africa, with which it shares a 1,106 km (687 mi) border, it is the only sovereign enclave in the world outside of the Italian Peninsula. It is situated in the Maloti Mountains and contains the highest peak in Southern Africa. It has an area of over 30,000 km2 (11,600 sq mi) and has a population of about two million. It is the largest enclaved country in the world. Its capital and largest city is Maseru. The country is also known by the nickname The Mountain Kingdom.
