Cats (and perhaps other mammals/animals with complex nervous systems) have the tendency to „disappear“ a few days before they die.
I lived in the countryside as a kid and saw several generations of our farm cats come & go. We never found out where and when they died, but all of them lived a long (cat) life and I‘m pretty sure most of them died of old age.
My assumption is that humans can feel that their time is coming as well, and apparently the experience seems to be similar for all of us.
Mathematik für Ingenieure und Wissenschaftler I, II and III from Lothar Papula (in German). The solutions are detailed, making it perfect for self-studying.
Book of Proof by Richard Hammack. A great introduction to proofs in mathematics. The book is available free online [0], but also I bought the physical version because I really enjoyed it.
An ex-colleague of mine worked for OneCoin (another crypto scam originating from Bulgaria) when their offices got raided a few years ago. Now he’s an engineering manager at Nexo.
I lived in the countryside as a kid and saw several generations of our farm cats come & go. We never found out where and when they died, but all of them lived a long (cat) life and I‘m pretty sure most of them died of old age.
My assumption is that humans can feel that their time is coming as well, and apparently the experience seems to be similar for all of us.