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Early menstrual cups were made of rubber. [167] The first menstrual-cup applicator was mentioned in a 1968 Tassaway patent; there are also 21st-century versions, but they have not been a commercial success, as of 2024. [168] No medical research was conducted to ensure that menstrual cups were safe prior to introduction on the market. [77]
The menstruation cup is still in use today, and has gained a lot of popularity. Many people choose the cup due to its benefits to the environment: the purchase of one menstrual cup is equivalent to 2800 tampons! Furthermore, the cup lasts longer than tampons, allowing for 12 hour wear compared to 8 hours. [6]
Ancient stone tools from Ethiopia were hand-crafted by Australopithecus or related people. [1] [2] [further explanation needed] 2.3 Mya: Earliest likely control of fire and cooking, by Homo habilis [3] [4] [5] 1.76 Mya: Advanced stone tools in Kenya by Homo erectus [6] [7] 1.75 Mya – 150 kya: Varying estimates for the origin of language [8] [9]
Marion O'Brien Donovan (October 15, 1917 – November 4, 1998) was an American inventor and entrepreneur.Recognized as one of the era's most prominent female inventors, [1] she secured a total of 20 patents for her creations.
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It's believed to be the largest one ever made, measuring 5-feet across and drenched in over 70 pounds of chocolate. 3. There's such a thing as a spreadable Reese's.
Everybody played house when they were little—and this life-like toy made it feel like the real thing. ... every little girl wanted a piece of the Strawberry Shortcake franchise, buying stickers ...
[4] [5] The first pottery was shaped by hand and was later facilitated by the invention of the potter's wheel (date unknown, between 6,500 and 3000 BCE). It was relatively easy to add a handle to a cup in the process thus producing a mug. For example, a rather advanced, decorated clay mug from 4000 to 5000 BCE was found in Greece. [6]