1) The concept of gravity was famously described by Sir Isaac Newton after an apple fell on his head.

2) Cows have best friends and can become stressed if they are separated.

3) The recent social and political movements advocating for LGBTQ+ rights have resulted in significant advancements, including the legalization of same-sex marriage in many countries and increased visibility and acceptance of LGBTQ+ individuals.

4) The term "bull market" refers to a period of rising stock prices, while a "bear market" refers to a period of falling stock prices.