Airlines, hotel companies, anything with a date attached, know they have you on the hook the closer to that date because no one buys airline tickets for tomorrow unless they are desperate, and there are fewer tickets available, so capitalism says you consumers will pay more because they must.

But even William Shatner knows the airline seat or hotel room has no value for the corporation either, once it is gone - he works for a corporation that makes money selling last-minute fares and hotel rooms because it is an asset that expires. That can be your advantage also because airlines and others don't want to fly empty so they often have the 'best' prices on a limited number of seats long in advance in order to break even.   Buying in advance makes sense also.

Since you are not Moses, with an omnipotently powerful deity covering your escape, in the situation of a fanatical pharaoh on your trail you may be confused as to how you could part the Red Sea and thus save your People.   Numerical modeling is here to help with some physics.

Tendons connect bones to muscles so if you want to run during a football game or fight a Trojan War, they are important.   If you didn't understand the clever pun in the title, the only vulnerability of Achilles was his calcaneal tendon (tendo calcaneus), because when his mother Thetis dipped him into the magical river Styx to make him invincible, she held him by the heel.

Naturally, it was his undoing.   So today that tendon of the posterior leg is called the Achilles tendon and a devastating weakness in an otherwise strong group or person is colloquially called the Achilles Heel (see Death Star - should we close that 2 meter port that leads to the fusion core?) 

Oxytocin (alpha-hypophamine ) is a nine amino acid peptide more commonly known as a neurotransmitter in the brain - a love hormone.

There have been many studies trying to discern the impact of oxytocin on things like maternal behavior and sex but researchers at Mount Sinai School of Medicine wanted to find out if oxytocin helped us to 'understanding' other people in ordinary social encounters.

Result:  They determined oxytocin selectively improves social cognitive abilities for less socially proficient individuals, but has little effect on those who are more socially proficient. 

A group of researchers are contending obese kids may not be the result of lax parenting or a junk-food culture; obesity may have an infectious origin, according to a cross-sectional study by University of California, San Diego School of Medicine researchers who correlate children exposed to a particular strain of adenovirus, human adenovirus 36 (HAdV-36 or AD-36), being significantly more likely to be obese with some causation. 

It's been hard for archaeologists to pin down the extent of idle wealth in ancient people, but it is generally believed only those in the richest locations, like capital cities, had it.   

A recent discovery, in an urban context and at an orderly archaeological dig, may be of great significance in learning about ancient people outside large cities.  Most small pieces of art originating in the Near East are of unknown origin, having been displaced through illegal antique trade, or purchased by museums and collectors before scientific archaeological research began, but an ornately designed signet ring of Apollo may lend some insight into the economic state of ancient Phoenicians.