- Tree of life (biblical) (Wikipedia)
In Judaism and Christianity, the tree of life (Hebrew: עֵץ הַחַיִּים, romanized: ‘ēṣ haḥayyīm; Latin: Lignum vitae) is first described in chapter 2, verse 9 of the Book of Genesis as being “in the midst of the Garden of Eden” with the tree of the knowledge of good and evil (עֵץ הַדַּעַת טוֹב וָרָע; Lignum scientiae boni et mali). After the fall of man, “lest he put forth his hand, and take also of the tree of life, and eat, and live for ever”, cherubim and a flaming sword are placed at the east end of the Garden to guard the way to the tree of life. The tree of life has become the subject of some debate as to whether or not the tree of the knowledge of good and evil is the same tree.
- 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.