Jacob ( /ˈdʒeɪkəb/; Hebrew: יַעֲקֹב‎‎ Standard Yaʿakov, Tiberian  Yaʿăqōḇ (help·info); Septuagint Greek: Ἰακώβ Iakōb; Arabic: يَعْقُوب‎ Yaʿqūb; "heel" or "leg-puller"), also later known as Israel (Hebrew: יִשְׂרָאֵל‎‎, Standard Yisraʾel, Tiberian Yiśrāʾēl; Septuagint Greek: Ἰσραήλ Israēl; Arabic: إِسْرَائِيل‎ Isrāʾīl; "persevere with God"), as described in the Hebrew Bible, the Talmud, the New Testament and the Qur'an was the third patriarch of the Hebrew people with whom God made a covenant, and ancestor of the tribes of Israel, which were named after his descendants.

In the Hebrew Bible, he is the son of Isaac and Rebekah, the grandson of Abraham and Sarah and of Bethuel, and the younger twin brother of Esau. Jacob had twelve sons and at least one daughter, by his two wives, Leah and Rachel, and by their female slaves Bilhah and Zilpah. The children named in Genesis were Reuben, Simeon, Levi, Judah, Dan, Naphtali, Gad, Asher, Issachar, Zebulun, daughter Dinah, Joseph, and Benjamin.

Before the birth of Benjamin, Jacob is renamed "Israel" by an angel (Genesis 32:28-29 and 35:10). The name "Israel" can be translated as "God contended", but other meanings have also been suggested. Some commentators say the name comes from the verb śœarar ("to rule, be strong, have authority over"), thereby making the name mean "God rules" or "God judges". Other possible meanings include "the prince of God" (from the King James Version) or "El fights/struggles".

Albert Paul Jacob (born 16 March 1980) is an Australian politician. He has been a Liberal Party member of the Western Australian Legislative Assembly since the 2008 state election, representing Ocean Reef. He won the seat after overcoming a notional Labor majority. He is a Justice of the Peace and a former councillor of the City of Joondalup.

Albert Einstein ( /ˈælbərt ˈaɪnstaɪn/; German: [ˈalbɐt ˈaɪnʃtaɪn] ( listen); 14 March 1879 – 18 April 1955) was a German theoretical physicist who developed the theory of general relativity, effecting a revolution in physics. For this achievement, Einstein is often regarded as the father of modern physics. While best known for his mass–energy equivalence formula E = mc² (which has been dubbed "the world's most famous equation"), he received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect". The latter was pivotal in establishing quantum theory within physics.

Near the beginning of his career, Einstein thought that Newtonian mechanics was no longer enough to reconcile the laws of classical mechanics with the laws of the electromagnetic field. This led to the development of his special theory of relativity. He realized, however, that the principle of relativity could also be extended to gravitational fields, and with his subsequent theory of gravitation in 1916, he published a paper on the general theory of relativity. He continued to deal with problems of statistical mechanics and quantum theory, which led to his explanations of particle theory and the motion of molecules. He also investigated the thermal properties of light which laid the foundation of the photon theory of light. In 1917, Einstein applied the general theory of relativity to model the structure of the universe as a whole.