After needing 13 liters of blood for a surgery at the age of 13,A man named james harrison pledged to donate blood once he turned 18.It was discovered that his blood contained a rare antigen that cured Rhesus Disease. He has donated blood a record 1000 times and saved 2,000,000 lives.
According to a new study appearing in the journal biology,the number of species on earth is estimated to be 8.7 million. Give or take 1.3 million, with approximately 80% of species remaining to be discovered.
