valentine's day why we do celebrate valentine's day and who his valentine?

south grass what is south grass and wher we found?

toefl writing practice. today we'r going to talk about weather and orgination a controll by biological clock or by other external fact, resarch have condected and experament with flying crows,flying crows normaly have 24 hours cycle to discover weather ther are efacted by the biological clock or external fact, resarch planed this crows in darkness are surrounding for 7 days to see of the steel have 24 hours cycle regardless ther envorment,are those this crows verry active in the dark it turn out when the captain darkness samulating hight for long direction of time they only have 23 and half hour sycle wich means that they are sycle was 30 minute faster,then this flying scrows was place back to ther original envorment with sunlight,after bieng kept in dark for longtime and seen the light the score return to the original sycle,this demistreet a cash and wich orgination has controll by external fact not by the biological clock.

how did scientists determine that a large meteorite had impact earth? the question is about meteorite impact who have answer of this question please help me thanks an advance

can someone write this conversation in english agar tum thodi der rukte to kya hum tumhe liye bager hi chale jate bahot jaldi h tumhe lift me chadne ki

what is the meaning meteorite

what is the meaning mess and mesh?

how do i get language exchange partner? i am glad to improving my english so i want to know about english speakers people how do i get people who speak english, thanks

hiii i m pravin i m learning english,because i want to study abroad make frnds from around world hii this is pravin i am learning english and i am looking someone who help mee to emprove my skill and i am glad to tell you about my culture my langauge and etc...,