Mnemonic: Freshwater makes up a very small fraction of all water on the planet. While nearly 70 percent of the world is covered by water, only 2.5 percent of it is fresh.

Mnemonic: Seahorses and their close relatives, sea dragons, are the only species in which the male gets pregnant and gives birth.

Mnemonic: A normal human head sheds 100 to 150 hairs per day. When the body sheds significantly more hairs every day, a person has excessive hair shedding. The medical term for this condition is telogen effluvium.

Mnemonic: The planet Neptune was named after the Roman God of the sea. The ice giant Neptune was the first planet located through mathematical calculations. Using predictions made by Urbain Le Verrier, Johann Galle discovered the planet in 1846.

Mnemonic: The sex of a crocodile depends on the temperature of the egg in the nest. If the temperature is cool, around 30 °C, the hatchlings are all female. Warmer temperatures, around 34 °C, hatch all males.

Mnemonic: The sun was formed as a result of of the rapid collapse of a hydrogen molecular cloud. After the cloud collapsed, the majority of the mass concentrated onto the centre, creating our sun.

Mnemonic: South African reserves of gold, platinum group metals, manganese, vanadium, chromium and aluminosilicate rank first in the world.

Mnemonic, 14 February: Former South African President Jacob Zuma announced his resignation today in 2018, with immediate effect. He served as the fourth president of SA from 2009 to 2018. Dj Zinhle/ BRICS/ F-35/ Given Mkhari/ Ndlozi/ Dudu/ Floyd Shivambu

Birthday, 16 February: Retired South African football player Marks Maponyane was born on 16 February 1962 in Meadowlands, Soweto. Jabulani Khumalo/ Make South Africa Great Again/ #POWERTalk/ Beitbridge, Zuma/ Malema/ Ndlozi/ Floyd Shivambu

Birthday, 17 February: South African politician Patricia de Lille was born today in 1951 in Beaufort West. She is the founder of Good Party and currently serves as Minister of Tourism. Jabulani Khumalo/ Make South Africa Great Again/ #POWERTalk/ Beitbridge, Zuma/ Malema/

Birthday, 17 February: South African former international cricketer AB de Villiers was born today in 1984. He was named as the ICC ODI Player of the Year three times during his 15-year international career. Jabulani Khumalo/ #POWERTalk/ Beitbridge, Zuma/ Malema/ Ndlozi/ Floyd

Birthday, 18 February: South African politician Jeffrey Thamsanqa Radebe was born today in 1953 in Durban. He was last appointed as Minister of Energy by Cyril Ramaphosa on 26 February 2018. Neo Moela/ Dr. Besigye/ Malema/ Zanzou/ Zuma/ Floyd/ Ndlozi

Birthday, 18 February: South African radio personality, DJ and podcaster Solomzi Thandubuntu Phenduka better known as Sol Phenduka was born today in 1987 in Vosloorus. Happy birthday meneer Thandubuntu Neo Moela/ Dr. Besigye/ Malema/ Zanzou/ Zuma/ Floyd/ Ndlozi

Birthday, 20 January: South African comedian Trevor Noah was born today in 1984 in Johannesburg. Noah has won various awards, including two Primetime Emmy Awards. #Sundowns/ SARS Commissioner/ #flooding

Birthday, 22 February: The late South African politician and founding president of the ANC Langalibalele Dube was born on 22 February 1871, KwaZulu-Natal. Zulus/ Nota/ Selena Gomez/ SANDF/ Somizi/ Errol Musk/ South African Human Rights Commission/ Dj Fresh

Birthday, 24 February: World boxing champion Floyd Mayweather Jr. was born today in 1977 in Michigan, United States. He retired with an undefeated record and won 15 major world championships spanning five weight classes. Nota/ Selena Gomez/ SANDF/ Somizi/ Errol Musk/ Dj Fresh

Birthday, 24 February: The late businessman and co-founder of the technology company Apple Inc, Steven Jobs, was born today in California, United States. He was also the majority shareholder of Pixar. Nota/ SANDF/ Somizi/ Errol Musk/ SA Human Rights Commission/ Dj Fresh

Birthday, 25 February: South African actor and former footballer, Eric Macheru, prominently known for portraying Leeto Maputla on the soap opera, Skeem Saam on SABC1 was born today in 1986 in Polokwane. Uncle Waffles/ Malema/ Jeff Radebe/ Mihlali/ Mtolo

Birthday, 28 February: Jabu Khanyile, the late South African musician and lead vocalist from the band Bayete was born today in 1957 in Soweto. He died at age 49 in 2006. Piers/ Naledi Pandor/ #MostAwardedBeer/ Kallie

Birthday, 4 March: The late South African singer Miriam Makeba, nicknamed Mama Africa, was born today in Joburg in 1932. She was an advocate against apartheid and white-minority government. Bafana Bafana/ Jesus Winner Ministry/ Abahambe/ Afriforum/ MacG/ Tucker