Fossilized footprints, preserved in gypsum mud that hardened over time, are estimated to be 23,000-21,000 years old. NPS / Alamy Ancient human footprints, preserved in a dry lakebed at White Sands ...

Explore conditionality, its role in international aid, loan agreements, and public welfare, and understand its various types, applications, and potential criticisms.

Discover how a clean bill of lading certifies no damage or loss occurred during shipment. Learn its role in international ...

NPR's Up First is the news you need to start your day. The three biggest stories of the day, with reporting and analysis from NPR News — in 10 minutes. Available weekdays at 6:30 a.m. ET, with hosts ...

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Introduction Charlotte has got a class on the first conditional. Download the free worksheet, join the class and improve your English! Language focus the first conditional Examples If they go to China ...