Question

Exactly how and when did life on Earth originate?

Answer 1

Answer:

4.5 ʙɪʟʟɪᴏɴ ʏᴇᴀʀs ᴀɢᴏ

ᴇᴀʀʟɪᴇsᴛ ʟɪғᴇ ғᴏʀᴍs

ᴛʜᴇ ᴀɢᴇ ᴏғ ᴛʜᴇ ᴇᴀʀᴛʜ ɪs ᴀʙᴏᴜᴛ 4.54 ʙɪʟʟɪᴏɴ ʏᴇᴀʀs; ᴛʜᴇ ᴇᴀʀʟɪᴇsᴛ ᴜɴᴅɪsᴘᴜᴛᴇᴅ ᴇᴠɪᴅᴇɴᴄᴇ ᴏғ ʟɪғᴇ ᴏɴ ᴇᴀʀᴛʜ ᴅᴀᴛᴇs ғʀᴏᴍ ᴀᴛ ʟᴇᴀsᴛ 3.5 ʙɪʟʟɪᴏɴ ʏᴇᴀʀs ᴀɢᴏ. ᴛʜᴇʀᴇ ɪs ᴇᴠɪᴅᴇɴᴄᴇ ᴛʜᴀᴛ sᴜɢɢᴇsᴛs ʟɪғᴇ ʙᴇɢᴀɴ ᴀs ᴇᴀʀʟʏ ᴀs 4.5 ʙɪʟʟɪᴏɴ ʏᴇᴀʀs ᴀɢᴏ

ᴛʜᴇ ᴇᴀʀʟɪᴇsᴛ ᴋɴᴏᴡɴ ʟɪғᴇ-ғᴏʀᴍs ᴀʀᴇ ᴘᴜᴛᴀᴛɪᴠᴇ ғᴏssɪʟɪᴢᴇᴅ ᴍɪᴄʀᴏᴏʀɢᴀɴɪsᴍs, ғᴏᴜɴᴅ ɪɴ ʜʏᴅʀᴏᴛʜᴇʀᴍᴀʟ ᴠᴇɴᴛ ᴘʀᴇᴄɪᴘɪᴛᴀᴛᴇs, ᴛʜᴀᴛ ᴍᴀʏ ʜᴀᴠᴇ ʟɪᴠᴇᴅ ᴀs ᴇᴀʀʟʏ ᴀs 4.28 ɢʏᴀ (ʙɪʟʟɪᴏɴ ʏᴇᴀʀs ᴀɢᴏ), ʀᴇʟᴀᴛɪᴠᴇʟʏ sᴏᴏɴ ᴀғᴛᴇʀ ᴛʜᴇ ᴏᴄᴇᴀɴs ғᴏʀᴍᴇᴅ 4.41 ɢʏᴀ, ᴀɴᴅ ɴᴏᴛ ʟᴏɴɢ ᴀғᴛᴇʀ ᴛʜᴇ ғᴏʀᴍᴀᴛɪᴏɴ ᴏғ ᴛʜᴇ ᴇᴀʀᴛʜ 4.54 ɢʏᴀ.

Answer 2

Answer:

4.28 billion years ago the earliest life forms named putative fossilized microorganisms found in hydrothermal vent precipitates had existed.

Explanation:

in 1953 two scientists named stanley.l.millerand Harold.C Urey did a experiment by creating a atmosphere full of atmospheric molecules like ammonia,methane and hydrogen but no oxygen over water which was similar in the beginning of the earth's formation. at the end of the week their were sparks taking place in it resulting in conversion of carbon from methane to simple carbon compounds that leads to chance of life in it. And few microorganisms started growing this is how life started on earth!

hope this was helpful^^