Explanation

Rhino horn is made up primarily of keratin – a protein found in hair, fingernails, and animal hooves.

Explanation

Elephants are the largest existing land animals. Three species are currently recognised: the African bush elephant, the African forest elephant, and the Asian elephant. Elephantidae is the only surviving family of the order Proboscidea; extinct members include the mastodons.

Explanation

Komodo dragon, largest extant lizard species. The dragon is a monitor lizard of the family Varanidae.

Explanation

Koalas have fingerprints which are almost identical to those of humans.

Explanation

Giraffes have the highest known blood pressure of any creature on earth for a very good reason: their hearts are fighting gravity every step of the way.

Explanation

Snails need moisture to survive; so if the weather is not cooperating, they can actually sleep up to three years.

Explanation

Explanation

The payback period is the number of months or years it takes to return the initial investment. 

Explanation

The trough is the bottom of the recession period, unemployment is at its highest, inflation is low.

Explanation

Scientific name: Giraffa

Height: Northern giraffe: 4.6 – 6.1 m

Mass: Northern giraffe: 800 kg 

Speed: 60 km/h